simbico

Yes, pre-portioned kibble and some occasional leftovers

Yup, we did multiple trips with him

bappy?

Where is the right hand

The new bikes at this price are usually specced with pretty basic components, that are prone to break way too soon.
Getting an older model that has higher end components is a better deal imo

I'd suggest a used road bike. In that price range a bike with an aluminium frame from the 2010s should be easy to find.

If you can buy a refurbished one from your local bike shop with some warranty that'd be the safest.

If you are not comfortable with drop bars my next suggestion would be a fitness/trekking bike, without any suspension.

Size fitting is important, check out any calculator what size would work for you.
Also you have to find well fitting contact points, especially when you start to go on longer rides: a comfortable saddle (harder is better in the long run), good grips/bar tape and pedals + shoes (clipless pedals later on perhaps)

As for training I don't think you can overdo it within sensible limits, your ass will hurt before that:).
You can check out interval training for building up stamina

Also a very capable downhill bike that was using a gearbox well before it got popular

Thanks for the tip on TinEye, havent used it before. I did do a reverse image search but could only find a shitton of pinterest results with weird hashtags, hence the reason I asked the community