what mod do you think is good for training for sp replays like aikido for joint utilisation ,or wushu for gravity, joint ,momentum understanding and stuff like that,but only the fighting mods (basics), like judo ,not the sp mods like parkour or running cuase thats when you apply what youve learned

Try any parkour mod. You should get the hang of movements after a bit.

I usually just mess around with the game rules on classic mode.

runing is good if you want to be ninja like or good at spars.

just do all of them! practice on every one.

That might be too big a mouthful for someone who just started.
Anyways, I almost always just use classic.
I often adjust gamerules though.

(If you want to adjust gamerules, then hold Ctrl and press the C-button)

no , i mean fighting mods , like when you fight online , what mod help you the most ?, ill edit the first post later

Taekkyon. Definitely Taekkyon.

It's great for finding the positioning of kicks and such.

Classic is never bad.
Also, training online is the best. you will learn way faster, when you can mess around with a buddy.

Classic.
Any parkour mod.

These will probably be the general answer from everyone, I suggest going for these.