I do a bit of all grain brewing. If your only experience of Home brewing is 1970s kits from Boots, it’s changed a lot since then. It’s easy to get hold of high quality malts, hops and yeasts these days that didnt used to be available to home brewers.
Kits aren’t a bad way of starting off to see if you like doing it - all grain requires a bit more of an up front investment in equipment.
I clean stuff using a dilute bleach solution - just make sure you give everything a good rinse afterwards to get rid of the smell. Bottles I just run through the dishwasher.
Ferment at a lowish temp - 18 to 20 degrees C for an ale. Commercial brewers brew at higher temps, but they also brew under pressure. Once you’ve bottled, you can move the bottles to a warmer place for a couple of weeks to help the beer carbonate.
If you want to go all grain, the Grainfather and Speidel are fantastic pieces of kit, although Speidel is a major investment.
The two classic beginner brewing books seem to be Charlie Papazian and John Palmer, but there huge amounts of online resources. I get most recipe ideas online and some craft brewers are releasing their recipes, so you can try to recreate a beer you like. BrewDog, for example put all of their recipes on their website a couple of years ago.
I don’t think it’s going to save you a great deal: you’ll never be able to compete with the cost of a slab of tinnies from a supermarket.