Welcome back. If you want to improve yourself, you could ask a teacher on the Toribash academy discord server to help you: https://discordapp.com/invite/KMhxeAp

As for mentality, I would say don't worry if you are losing a lot. 60-70 hours is not much compared to a lot of the people who play this game, especially when it is spread out over several years. The game is much more fun when you know what you are doing, so it is worth committing to it. If you practise, you will get better, but the hardest part is probably getting past the initial difficulty, and learning to avoid falling over in the first few turns of a fight.

I'd also recommend trying different mods so you don't get bored. Obviously aikido and aikido big dojo are the most popular mods, and they are fun, but don't forget that there are other good mods as well. s_wrestlewip17 is a really good grappling mod, with no sticky grabs or points. The only way to win is by forcing your opponent's head or torso to touch the mat, or by throwing him off it. There are also several good boxing mods, with realtoriboxingmw2 being the most popular, and there are good weapon mods like sabreswip, as well.