you have 3 viable options
1) nolife, if you will play 8h+ per day you will progress and get decent cp that will help you with gear
2)multiple clients - if you will run 3 or better 6 clients on 2 pc to 24/7 afk grind you will progress, slowly but due to ncwest garbage servers you will have dc often
3)cash, if you are willing to cash in for some 200% exp boost, drop boost, skill reuse time, buy gear with adena r99 set will cost ya clean 900 000 000 and weapon starting 2-3 000 000 000 adena, then you can play in 1 client
I would not recommend to start playing now, servers are disconnecting often, drop from mobs is bad, spoil is bad, most viable option to get adena and items is using cash
at least wait for next update with better loop macros, that is only good thing in this game now