Now you can finally play the game! Congrats
When I got my quest cape on my first main my next goal was: 80 in all stats. You should already be pretty close, as doing all quests requires around 70s in all stats, after that, hit slayer hard until 99 and nearly max combat. This will make you a decent amount of gold, and can also be a transition into bossing
Next there are 2 paths: continue bossing, transition to learning raids which is endgame for PvM
Or: get base 90s, then max, then take the PvM route
Secret option: max combat, or leave defense + prayer + attack where it is and max str/ranged/mage and learn how to PK as either a max main or med level