Exp to untis

[Vixtrime]

Is there any ways to get experience to my units? Enemy lords have over 500+ warriors, i have a lot of money, but  havn't strong warriors

[Indo95]

the best way is to keep farming bandit types (outlaws, clansmen, tribesmen, ironmen, sea raiders, wildling raiders, slavers, pirates) and get syrio as a companion.

Stay away from Robber Knights until you need an army 

[Maester Rawl]

Syrio also makes a great trainer for the player and troops.

[player]

Is there any ways to get experience to my units? Enemy lords have over 500+ warriors, i have a lot of money, but  havn't strong warriors

Why not use robber knight? they'er strong ，reliable source to get. Use  them , you can beat lord's party. Then you can use their top soilders.