Can someone PLEASE help me understand Triple Triad?

I must be really dumb because unless i get really lucky or I have someone telling me what to put, and where I can't win.

I've won a few stronger cards Like Bahamut and Godbert from the King III guy, but I only won those by watching tutorials online about how to do so.

I've played maybe 50-60 games so far and have only won 10 or so games. I just don't get what I'm doing wrong it seems like no matter what cards I have, like Bahamut with the 9's the NPC's still win.

I understand the rules, the fact I need a higher number, same number, or the same sum, ect

I just don't get the strategy and gameplay. I can't wrap my head around understanding where I need to put what card and why.

So is there some sort of strategy guide/Triple Triad for morons, or am I just a lost cause? I suck at video games in general and can't win any other GS game for the life of me so far TT seems like the only way I'll even earn points.

Thanks.