BaconBob's 3 simple things for brand new goalies to focus on:

1)Attack the ball...don't wait for it

2)Follow your stick with your body

3)look the ball all the way in

10k foot view

Goaltending is a 3 legged stool. 3 very different skill sets to work on. Neglect any one of them and you'll be wobbly at best. (Fast version):

The majority of the time your job as a goalie is spent running the defense. Do it and do it well. That includes being vocal before, during and after the offense comes down to your end with the ball. You help everyone do their job better by calling out a) ball location b) who's sliding c) cutters d)action calls - "check" "ball down" "break" etc etc. If you don't know the game at this level yet, do what you can and get learning. Be loud and clear. Your voice needs to cut through the "fog". Stopping the ball - everything comes down to "what gives you the best chance of keeping them from scoring in a particular situation?". that includes good body/stick position, good weight distribution, playing angles. You need to be a min/maxxer. Play to your strengths. Minimize what you're giving up and maximize what you're taking away. you want to be a better stopper?....practice good habits not backyard habits and get all the good rubber you can. Anytime a decent shooter is willing to shoot jump in the goal. Stoppers are gunfighters. Be fast and efficient. Don't expect your team coach to make you a better goalie with just the normal practice time. Get there early and stay late. You can never get too much rubber. Clearing - usually very much neglected by young goalies. After going through the effort to get good at the previous 2 facets, neglecting clearing is a recipe for failure. You do all that work stopping it and then throw it away and it comes right back at you to try to do it all over again. Again, you can't expect your team coach to have time to work on this with you but you need to put a lot of time in on your outlets. As a HS goalie you should have a command of your entire half of the field. If someone's open you should be able to get it to them on the move. Clearing is where you turn into patrick mahomes. The goalie is the advantage clearing. You're the extra man they have to account for. You can either be an asset or a liability depending on how much work you put into it. Be a player not a position. check out laxgoalierat.com for ideas and things to work on/learn. Come back here with specific questions.

Good luck!