Tuchel made the right choice accepting the England job but pressure has nothing to do with it. It's going to be one of the most stressful jobs he's ever had. The English media is one big mess. they've already started attacking him and bringing up stuff about his personal life and divorce.
They don't like the fact that a non-Englishman is England's manager which is some bs because they might not be complaining this much if it was Pep Guardiola. He's going to get a lot of pressure and criticism and even hate. The only way to turn that around is to provide results immediately just as the case was with Vincent Kompany at Bayern Munich.
I think it's a good thing the English FA went for a non-Englishman for the job because England historically doesn't have good managers. I mean, it's no secret that an English manager has never won the English premier league.
England has a lot of quality in all areas of the field and with a manager like Tuchel, they might have a chance at some silverware.
You should also know that his predecessor got back-to-back Euro finals so any less from Tuchel won't be appreciated. He's under a lot of pressure I assure you.