As usual, others are providing good answers and I’m going to ramble on a bit as well.
Exploration: I’d forgotten how much stressful fun it can be. However, if you look at it from a purely cost/loss/profit can be lucrative. You don’t need an expensive ship and modules. A good basic explorer is a million ISK fitted. Get scanning and hacking experience in hi-sec, then wander into wormholes.
There are riches and risks there. Get used to d-scan. Run if you feel nervous. Go for the pure data and relic sites - avoid the protected ones. The hacking will be hard, but for example in one Class 1 wormhole relic site this afternoon I pulled 50m ISK of loot. That felt lucky though. I’d view 20m ISK from single site in a low rated hole as a good par.
Bookmark the wormhole (entry point) you came in through so you can get out without scanning. It’s tense, nervous, work, but more exciting than mining.
I sucked 15m ISK out of gas clouds there as well.
The Heron isn’t as spectacular as my Helios - a T2 dedicated explorer with T2 analysers - but the Heron and other T1 explores are capable and have one big advantage: they are cheap enough to be expendable.
With T1 analysers - the I version not the II that takes more skill - the hacks will be harder, but you will be taking your early learning with you.
Sell what you find on one of the major markets - the in demand items will have a narrow gap (10%) or so between buy and sell orders. I like Amarr - but that’s my locality - it’s got a good turnover and isn’t as risky for a loot loaded explorer.
Fit the Heron for scanning, hacking and bugging out fast. You aren’t in a combat ship, don’t try and turn it into something it isn’t.
Good luck and happy wandering.