Get one of the setups available to infuse the wort with pure O2 to oxygenate before pitching the yeast. Depending on the OG, you're not going to provide nearly enough O2 for the yeast to be able to do all they can without stressing. Using just O2 in the atmosphere the maximum amount you can get into the wort is 8ppm. Fine for low OG brews, but that's about it. Get one of the O2 infusion stones on a stainless wand along with an actual regulator (flow/min) and you're up and running. I've been using my same setup for about a decade now (even with my time off from brewing).
I also agree with getting your own malt crusher. That way you can buy your grain for several batches at one shot and not need to worry about either freshness or if you decide to tweak the recipe before brew day. Crush on brew day and you're set. Motorize the crusher and it will make your life easier.
I've been fermenting in converted commercial beer kegs for a long time now. Zero chance of light hitting the brew/fermentation, pressure safe, and I don't need to worry about it breaking/cracking. A plastic fermenter will fail long before a stainless one will. Plus, if I EVER get an infected batch, I can simply steam/boil in it to get it cleaned out.
I've gone the fermentation under pressure route since I started brewing again. Partially due to higher basement temperatures than expected. Partially because the batch is also partially carbonated when being transferred into serving/carbonating keg. It also reduces/eliminates the need for blowoff tubes for over active batches.
I also transfer under pressure (gravity syphoning sucks balls) since early on. Once I pitch the yeast into the batch, the fermenter doesn't move until it's ready to be cleaned. I have 2" TC caps with a thermowell and liquid ball lock setup on them (my gen1 caps). The gen2 caps will include the CO2 in ball lock fitting/setup as well. I actually plan to make the first of those in the next week or two. I have most of what's needed for the first one ready, just need to get the parts to my welding buddy to get him to TIG it all up. Especially since I want to convert an untouched 1/2 bbl keg into a fermenter for the coming brew. My current large batch fermenter (50L or 13.3 gallon) would be a bit tight for the 12 gallon end volume batch (about 13 going in).