RE: New bow; Form.
It is next to impossible to learn proper form on the internet. I tried it myself and I got a lot of good information, lots of bad information, lots of assumptions, and no guidance. It hurt me more than it helped me and created a lot of issues I had to work through with a good coach. This is why I try to refrain from giving advice online for form, and why you will see lots of people that won't do it either including (I assume) Len.
Even if you can get the form down, there are other things that are just as if not more important such as shot sequence, timing, rhythm, psychology, etc which are all next to impossible to work on without being there in person and having the ability to use video as a tool to capture and see what you are doing. Minor tweaks in your form won't really do much if you don't do these other things as well so unless you are willing to put that dedication in what you are doing is fine.
With all that said, the best way if people are really serious is to start seeing a NAA or NFAA certified coach and plan to take 3-4 months at least of no shooting at anything in particular, just blank bale and then aiming drills.
If you don't have that type of commitment level then what you are currenty doing will suffice and I am sure you can be competitive on the local level in 3D, and probably kill a lot of critters as well. The form and repetition will show up in spots shooting though, thats for sure and it will be difficult to be a well rounded archer in all venues without that type of work. Field archery, FITA, and indoor are very very difficult to be competitive in without this type oftraining/coaching. I really don't know anyonethat has gotten to thattop tier of thesevenues of archery without a good coach and I am fortunate enough to be in an area saturated with people that are extremely competitive on the national and international level..................and they all have coaches.
It amazes me that people will dropthousands upon thousands on equipment and want to grow into being a better archer in general but can't stomach paying for a good coach. It's the best money I ever spent and I would rather have a 10 year old bow in my hand and $$$ for a good coach that I trusted than a new bow and no coach. $400 these days will generally give you enough guidance to work through a lot of this stuff.
How bad do you want it? [8D]