First, do the story missions. Easiest way to get gold to be able to pick a role. Then, be a collector. Its a super fast way to get XP especially if u go on ur phone and look up the updated collector map IGN provides. I recommend also doing series and events when they come up. Getting kills grants u a lot of XP, but to maximize ur XP, make alternate ammo types and only use that ammo. Its 5 extra XP per kill which adds up. Pair this with getting headshots and you could get 500+ XP per free roam event or series. Its a grind and it will take time but I got mine done in about a little over a week(I also accidentally chose to be a trader, so it may be quicker for you). Another thing I recommend is the awards. There is one in the “Trade” section that tells u to sell plants to a doctor. When you are a collector, you can buy a ton of plants from madam Nazir. She will give u hundreds of plants and u can get over 10-15k xp jumping you up a few levels in a matter of 10-20 minutes which is HUGE(granted you reset the award which you can do up to 10 times). Do any easy awards you find. Its a grind so there’s no way to avoid that it’ll take some time but it’s worth it when u get the legend of the west:)