Don't convert player skates, use the goal skates. Get them baked, stretched, punched, whatever. Player skates won't allow the movement you may not currently have, but will need in the future. Take as many breaks as you need, both to rehydrate and to stretch. Stretch when play is at the other end, and every chance you get. Also use the time when play is at the other end to work on movement. Look up how to push off, and get from post to post. I know you may feel like most of this is above your skill level, but if you don't start doing it now, you'll get used to NOT doing it, and you'll have to re-train yourself later. I made this mistake.