Hello Mike,
welcome to the forum, I echo what everyone else has said here, but it is very difficult to tell you what to do without seeing the chisels first hand, the advice to join a club is the best bet. Do however be very wary of you tube videos, not everything that is shown on them is safe or a recognized method. And some of the techniques shown are best avoided. I would suggest having lessons to show you the basics.
regards
John BHT