Big Tier

Super new to this game, though I've played it a little before. Trying to pick up I-No, but having trouble finding combos that work pretty consistently on the whole cast. Does I-No have to rely mostly on character specific combos, or is there a semi consistent bnb for like, a VCL YRC combo, or a j.D combo? All I've got really consistent so far is 2K > 6P > 5H > IAD > j.K > j.S > VCL > j.S > j.H > HCL > followup, which I'm pretty sure works on the whole cast, except I gotta super jump for Sol, May, and Faust. Can anyone help me understand how this characters combos work, kinda generally?

I managed to get it once after a few hours, and then got it pretty consistent over the hour after that. Definitely something you just have to adjust to the timing for. With that said though, what really is the crux of the fireball oki? pull it back into them and mixup high low?

Having trouble with 623 (K) 4 loops, like the ones where you partially charge it, are they real important to the character or can I take some time to learn that and still do fine with him? Also, tips on doing those loops in general?