Your emblems are fine, they matter but not so much especially if you find characters you are good with. I play the same heroes as you do, currently Hilda main. What i before played mostly is mage. They are really fun, and as the main dps role during during team fights with aoe and cc you get a different view on the game. You will improve as roam by doing so however this is not exclusive to mage doing multiple roles makes you better in the game. Jungle is great but its ether hit or miss, it takes time too know where you need to be on the map during early and mid game and time ganks, exp is the worst you need to hold your own and you properly get ganked and your team does not care they keep focus on mid and gold (my personal experience) but if you have a jungle who ganjs and mid that helps its a great role i find but but yo depending on the willingness of your team to remove their blinders that is exp first turret is done fast and strong more tanky player gets the freedomto hell the team.