You said 'ANY' recommendations, I recommend a Keelback!
This is for learning only and not intended for any PVP encounters... wouldn't last 5 seconds in a real gank!
The Keelback is the cheapest ship with a fighter bay... If you park at the center of a rez site or nav beacon and deploy your fighter and give your mothership instructions to 'Hold Position', that gives your fighter 25Km in all directions. Almost all activity will take place within that range, however when you tell your mothership to 'Hold Position' if you get killed in your fighter you spawn back in your mothership which is often more than 5Km away giving you time to escape.
The big benefit to using fighters to learn, is that you have access to almost 20 different configurations for very cheap. There are 3 different ship types that all fly differently and 2 of the three even have different max speeds. you have access to fixed and gimbled weapons of different types as well as different utility protections. The way fighters are set up, it will force you to start learning pip management to survive. When you learn, you will be able to take down ships many times your size.
Another benefit to fighters is the loss of fear since you have 6 of them at a time. That loss of fear will allow you to push yourself to try things you normally wouldn't, like FA-off fighting and canyon running. Each of the fighter rebuilds takes 1 and a half minute so watch your scope if you didn't finish off your enemy... usually security forces will finish them off for you before they get to your mothership. In time you will use 'turn crimes off' so you can learn to fight without police help.
You mentioned that you got your first Engineer invite, so that should be Felicity. I put together a build only using Felicity below that should allow you to gather Ship and Foot materials as well.
This build has a point defense in the front so you can get your Guardian modules and weapons as well as a beam laser for charging up the Guardian Beacons to get the 3 additional Guardian fighters as well. The Operations multi limpet controller has 4 limpet control instead of the 2-limpets that could go in that space from a normal collector... it is a bit heavier, but in addition to the extra collection limpets, you also can use them as hatch breakers or recon limpets. I only put a size 2 cargo rack on because Synthesizing 4 limpets is pretty cheap to do. However, if you were trying out a little criminal activity you could swap out the fuel scoop for an additional 16 tons of space since you'd be local anyway.
The Dumb-fire missile also serves so clear out the pirates on ground if your doing power-restore foot missions or whatever. the Detailed surface scanner for the other planetary POI and for doing exo-biology. The price of this build without the Li Yong-Rui discount is 17+ Million... 14 Mill with discount, And since you're already an explorer, you know that's only 1 scan equivalent.
Here's the same build in EDSY and Coriolis...
https://edsy.org/s/vgUaNTa
https://s.orbis.zone/qAuE
Edit... I mentioned material gathering but forgot to mention that the dumb-fire missiles also work for surface gathering with sites like the Brain-tree forest just outside the bubble. this build is 35 LY jump range.