Once you reach 4-10 and HBM T, lava is your next big goal.
Different positions require different heroes, until your team is strong enough that your heroes can participate in public lava, which usually wins despite not having ideal heroes for each position.
Positions in Lava 3 are usually called tank team, tree team, val team and Ice Demon team. Find a group that needs a member, ask them what position they need. Meanwhile you can work on key heroes named in teams, PK; and if you roll GS, then fast level her.
Name: Rusty (Rustyx in game)
Guild title: resident wisenheimer.
Line ID: Rustytroll (big shock there, eh?)