IMO Boiling water is typically just fine for most coffee, unless it’s a dark roast. By the time it’s in the press and accounting for cooling it’ll be mid 90s.

No worries with blooming on a French press!

I’ve been using French press for 20 years and tried a bunch of things; the only complication that stuck is the Hoffman Method (and of course a decent grinder). It’s the graph with a bubble in the middle - don’t know enough, knows enough to be way too intense, knows enough that the intensity doesn’t matter.