Since you aren't playing any ranked rounds, I would suggest waiting for a bit more before you buy any clubs. Buying lower level clubs is just wasting your credits, as you will need to upgrade them as you tier up higher.
Probably what everyone feels is the best set of irons available to lower levels, the Ping G25 irons are available @ level 59. They are a hugh game changer. Try earning free credits by watching videos and doing surveys if you have the time.
But if not, wait for a special on balls before you buy credits. WGT has offered Nike L40 Red balls and Max slow meter balls in the past with one free sleeve for any 1 time credit purchase of $20.
Nike clubs have already left and Nike balls will follow soon. So that offer may not be back. Max balls are slow meter balls, but don't offer any or very much spin. Hopefully some other brand of good name brand balls will be offered if the Nike offer goes away for good.
Practice rounds and Blitz games do not have an effect on your average. If you hope to improve more you will have to start playing ranked rounds and moving your average.. That's why you are a lvl 49 Pro with an average of 150.
Also no stats count. If you are enjoying the game try playing ranked rounds instead of practice rounds. You are missing out on the social part of the game also. Make some friends, and join a Country Club once you have a real average. Play some multi-player games. There is a lot more here to enjoy.
As far as what you are playing now I have no info about what's required to stream anything. And ask yourself who would want to watch what you are doing? It won't help anyone learn anything. As you admitted, by watching Young46 and Fmags you have learned a lot.
Good Luck and enjoy the game.
phred952