Hey guys. I'd like to share my first range construction with Flopzilla and maybe fix some leaks before moving on.

BTN Raise First In VS BB Call

randomly generated Flop: Ts8c4d

Flopzilla Results for a 43% BTN RFI:

Because i didn't know where to begin i simply eliminated the hands i didn't wanted to bet with and came up with a Flop Cbet range of 294 combos which is 58,5%

The Turn came a 2d. I repeated the same process an came up with a Turn Cbet range of 139 combos which is 48%

The River came a Qc. I decided to go for value with 2Pair+ which is 47 combos or 35%. I remembered from a Janda Theory Video that our river range should have a value to bluff ratio of 2:1. So i added 24 combos of bluffs:
Jx[AJ(1),KJ(1),J8(1),J7(1)], 9x[A9(1),K9(1),98(1)97(4),96(1)],76(4),75(1),65(4),K6(1),K5(1),K3(1)

Total river Cbet range is 71 combos or 53%

is this a good starting point?
which improvements do you suggest?
how important is bet sizing?

thanks