While your FIL has given you some prac lessons, it sounds like you may have little understanding of the anatomy & function, therefore the principles that govern when/why you do something & how far... & when why not to. I would suggest you do your theory homework before just getting stuck in.
As Walkin suggested, if you want any specific advice, you need to provide pics to start with. Check out link in signature below for what's needed. Also info on diet, environment, work, etc is helpful.