This isn't any easy question to answer . . .
When it comes to the actual flash heads, my own preference would be
1. Bron
2. Profoto
3. Godox
4. Elinchrom
With Bron being way ahead of any of the others, but with a massive price premium. And that price premium also applies to the accessories, which in my view are at least as important (probably much more important) than the flash heads. There are a limited number of light shapers actually made by either Bron or Profoto, other manufacturers supply adapters to fit them but they aren't always great.
When it comes to flash heads, all that really matters is consistency - that's consistency in both the quantity of light (flash energy) and the quality of light (colour temperature, which is why I would rule out most makes not on my list.
Lencarta (among others) sell Godox equipment, they also have a fairly wide range of tutorials on product photography, which you'll find in their
Learning Centre.
You'll find loads of tutorials on YouTube, I haven't looked at any of the ones sponsored by Profoto for a long time - things may have changed but in the past their tutorials seemed to me to be nothing more than advertorials and it is obvious to experienced studio photographers that the results shown often weren't even produced by the featured equipment.
Still life photography (including food) is a very specialist subject, but fortunately there are quite a few of us on this forum who know about it, so please ask specific questions. It would help us to know a bit about your own approach though - for example if you're going to use a monorail camera then the answers will be very different to if you're going to use a small(ish) digital camera, and if you have a large budget then the answers will be different than those for a small budget.