From my experience synthetic fertilizers are much better for beginners. Organics are the most fun and ethically correct (for me), but the fact of the matter is, they can be extremely expensive, and the art of amending soil using organic meals, microbiotic innoculum, base substrates, aerators, mineral dusts/sands, etc.. is close to alchemy. There are so many combinations of ingredients that make their nutrient content bio-available at all sorts of varying rates. They are also required to be applied in bulk, which means prohibitive shipping costs for people who are between hobbyist and commercial level operations. What I have come to learn is that it is best to use both synthetic and organic fertilizers. For organics, which require bulk, I rely on composted materials that I can gather locally: horse and cow manure, coffee grounds, vegetable scraps, tree leaves, mulch, grass clippings, newspapers, etc.. and I compost them in my worm farms. Occasionally I will dust my worm farms with some organic meals and azomite or glacial rock dust to slightly boost their organic content. The worm castings are then used as my only consistent "organic supplement." The fact of the matter is that miracle gro and 10-10-10 do the bulk of the work in my garden. As I mentioned previously, with organic fertilizers, you do not know exactly how much of a given nutrient will be available at any given time. Synthetics are theoretically more easy for beginners to apply precisely because it is more of an exact science than an alchemical art, as in super-soil building or compost tea brewing.
Now as I say, for me building a super soil or brewing compost tea and relying solely on organics to provide all of the nutrients required for a flourishing garden is the holy grail. It is something I am always aspiring for, but for the scales I am growing on with the resources I have, it is a prohibitively expensive project. The hard truth that I have learned is that synthetics are cheaper and give you immediate results by the very nature of their chemical properties (free ions.) Now it is another matter which "brand" of synthetics is the most cost-effective. Personally, because I grow in-ground (where calcium and magnesium are abundant), miracle gro all-purpose 24-8-17 is the most comprehensive and cheap nutrient I have found in my research. This is another hard truth to swallow. Miracle gro is produced by a chemical company that is simply able to provide those nutrients for the best prices. If anyone knows of another company that produces the same formula for cheaper then let me know. The closest I have seen is greenway biotech and they are still more expensive ..so its not even worth it for me to "try them out."
In summary, organics are the most ethically commendable option, but they certainly require the most expertise and patience to achieve "outstanding" results. For beginners on a budget, I would recommend purchasing a complete synthetic fertilizer (dry powder of course [bottled nutrients are 99% water]).... and follow the directions on the package... first using 1/8 strength feedings for 3 week old seedlings and increasing the dilution little by little until you are feeding full strength when they are in their permanent positions in the full summer sun. You will achieve results this way, because it is an exact lab driven scientifically verified, proven winner formula. For those who are more intermediate and have a larger budget, I recommend playing around with composing a super soil and jazzing it up with the plethora of organic meals that will make you feel like a kid in a candy store... you need a little of this and that and before you know it you have a cart of $500 worth of amendments for your "alchemical recipe" that will give you the ultimate garden... when for $50 worth of miracle gro and $50 worth of 10-10-10 you would easily have enough of each nutrient your recipe would provide for 1/5 the cost.... and, furthermore, you KNOW exactly what your plants are getting and how fast, and you can see the results in the plants within hours. I want to re-iterate that the best option in my opinion is to use organics that you can derive locally (and for free) and spend your precious money on a complete dry powder fertilizer program to give your plants the fuel they need to be "extraordinary."
Also... do as I say and not as I do, because I just gave my brother $30 to get me 50lbs of cottonseed meal XD