The only alternate suggestions I have with @stefnia_Freir’s fit would be:
The Rattlesnake may be a better choice than a Navy Raven on the way to a Golem - as long as you have halfway decent drone skills.
Recommending a very expensive ship to someone who just returned, who struggled with L3 previously, is irresponsible.
The Golem is going to be a huge target for gankers, and a very expensive loss for someone who only has a fraction of the funds to afford one.
OP: A standard Raven is very capable L4 runner. Use cruise missiles, a Micro Jump Drive, get to 100km+ range and salvo NPCs from safety. Pack some drones for frigate NPCs.
There’s not a huge price difference between a Navy Raven and a Rattlesnake, and not a big price difference between a Rattlesnake and Golem. The Golem will have the best return on investment - the Rattlesnake will be the most forgiving. You can run both as mostly (entirely) T2 fits and you’ll do just fine.
Get those skills up. A Raven should be a powerhouse and make Level 4 missions super easy. Should have at least 800dps with 1600+ alpha. Seven mid slots allows you to put on a nice tank and that should easily be over 40kehp or a lot higher.
Lots of great advice above. Have fun with it and go for Golem if you can afford it as its an upgrade to most of what makes the Raven great. And don’t forget to use your drones when anything gets close.