Low end PVE is quite practical with Alpha skills. Your Rupture may not have the benefit of Omega skills but it can still fit T2 weapons and tank. You may need to make some adjustments for CPU and power grid - in general it’s easier to fit autocannons than artillery. Pyfa has replaced the EFT fitting tool you probably remember from 10 years ago.
To get reacquainted with the game, I wouldn’t bother with a new character - simply refit your Rupture to match your current skill limitations and run some new player content like the SOE Epic Arc