Hmmmmmmm
Can you handle the 45# pound draw ? Maybe you only have a 25" draw ? If so, don't worry about it. You'll be shooting 3# less per inch, so your 45# bow becomes 36# or so. If you're struggling with the weight, take it back and get something more comfortable. Be true on this, and overweighted bow will KILL you. I had a bow and I tried to master it for months and I couldn't because the weight was too much for me to handle properly.
I have a different view than most, but here it goes. To do anything that requires cooridnation between the hand and eye, there must be consistancy. That is, when you draw, you do it the same every time, and when you anchor, the same place everytime, and when you release, the same release. Every time. Focus is also very important. But starting out consistancy is HUGE. You don't have to shoot like Byron Ferguson or Fred Asbell, I don't believe there one set "way" to shoot - you'll find your own.
But I PROMISE that if you draw, anchor, release and have the same focus on 3 consecutive shot, you'll shoot 3 arrows into the same place at 20 yards. Easier said than done
I shoot split finger. I also shoot cross dominant on my hand/eye. I'm a fair shot, but I've had to shoot thousands of arrows to get any consistancy.
I don't anchor to ammount to anything - I focus, I draw, I touch my anchor and most often I release right then. Smooth, fluent - no anchor to ammount to anything. Some guys draw, anchor and hold, then release. I find it messes up my rhythym
Do you play basketball ? Its an analogy I like to use a lot. Form is everything, and then once you got that down, it becomes a mental game. Also, once all that falls into place, you'll be able to go outside your form and still make shots, much like an off balance jump shot.