What is the best way to train it up at level(Runescape Money) 1 when you just starting agility and wondering. It just deposit all of your food and armour into the bank, equip your spottier cape and boots of lightness and either teleport to the Gnome Stronghold using the Spirit Tree or walk from Seers Village. You can get ready to begin the Agility Skill if you arrive at the Stronghold.
It is impossible to fail even at level 1 at the Gnome Stronghold Agility course (located South-East of the stronghold). So make sure you haven't brought any food or armour as it will just decrease your run, something you don't want if you are trying to get your maximum experience per hour.
You need to walk into the arena, and walk along the log balance in Runescape. Once completed, climb the netting, then the branch and you will notice yourself directly next to a rope. Click this rope and once you pass, click the branch closest to you. You will notice yourself back to the ground, then click the netting north of you and once completed click one of the two pipes. You've completed your first Agility lap.
Each one of these laps gives 86.5 experience, which in total is approximately 6,400 experience per hour. Not a huge amount, but it's the best experience you will be getting at this level(Runescape powerleveling).