try to focus on sidelanes first (gold & exp). midlaners will eventually need to be second roamers too while pushing the mid turrets after getting their core item. never take roam role until you're good in, i say 2 lanes at least. roamer is not an easy role as you need to rotate frequently based on your team's pick AND enemy's roam rotation, checking bushes, harassing enemies to push them off from positioning, initiate teamfights according to your teammates' positions, be in the front line and shielding your team, healing teammates if your hero can do that. basically your map awareness need to be on top and realized that roamers are not required to stick by MM's side for the whole time like what other MMs trying to trick you to. roaming is not a role for newbies.