I'd say there's really not a "bad" choice amongst modern mirrorless. Since you're not a beginner in the area of photography, I'd argue good glass is just as important. I avoid kit lenses. You may want to check out the lens ecosystem, as some are more limiting than others. When I was looking, I found the Sony APS-C / Fuji X lens ecosystem quite limiting, but that's just me. You may find it fine.
In addition, you need to factor in the size of body with glass and the likelihood that you'll be carrying that kit wherever you want. For many, if it's too bulky for everyday use, they're just not going to bring it out.
Since it seems it's more casual work, you may want to look at the OM System (previously Olympus) OM1 Mk1 as the m43 lens ecosystem is one of the largest. The current iteration is the Mk2 so you can find plenty of Mk1 bodies on the cheap, not to mention some great Olympus PRO / Pana Leica glass. Like
@GuiltyGear , I'd love an OM-3 (OM1 Mk2 capabilities in a slightly smaller body), and you can sometimes find an OM-3 with 12-45mm PRO lens (yes, kit lens, but at least a little better) on Ebay from either OM Systems directly or from JP. (Not sure if you're located in US or elsewhere. Tariffs and all that.) Here's a
running thread over on FredMiranda forums on m43 pics from users.
Edit: I assume you're from the UK and am aware of the substantial duties/VAT on imports.