Not much else, since you don't want to go to a trainer. Um to train you armor up go find a corner and lure a mudcrab to you, let it hit you continuously until your armor is at zero, kill the crab repair the armor and repeat. If you want to train Athletics tie a rubber-band around the movement stick so you are continuously moving find a corner and run into it. This also works with Sneak, be sure to check if people are nearby so u get credit for sneaking.