Sure, why not. You have the game, so you might as well experience all the content and pick up the achievements. As far as hints, just do exactly what you did during the RR playthough, except don’t betray the Institute.

My advice is to never go in the Museum of Freedom. Makes the game 10x better.

It’s entirely up to you.

I’ve never done an Institute play through, simply because I’ve always preferred the peaceful Minutemen ending or Brotherhood ending with the mod Danse Dilemma installed. So I haven’t got any advice I can give. Enjoy the play through.

I did Institute last time and it will feel fairly familiar for the most part because it's a lot of the same quests you'll have done with the RR. A piece of advice I can give is don't join the RR there's a quest in the Institute quest line that you don't get if you've completed the RR opening quest Tradecraft.

If you're anything like me it will take a while because every time I talked to Shaun I had to pause for a few minutes to calm down and remind myself I wanted to do an Institute run.

Speaking of Shaun try not to argue with him too much, I know you're doing an Institute run so will probably agree with him anyway but make sure you side with him when you can, if you disagree and argue with Shaun too much you can get kicked out of the Institute at some points.

If you're still missing a few achievements, there are some that you can only get for siding with the Institute. Other than that I don't have any tips, except try not to blow Shaun's head off.

The Institute questline, in my opinion, was by far the most fun.

We can debate the finer points of the factions, I mean the Institute really aren't helping themselves seem like the best choice with quite a few things, but damn the questline was good.

The Institute side quests are also quite interesting.

I liked the the Railroad questline slightly better because it's mostly the same, except you're secretly working against them from the inside. Going incognito aboard the Prydwen and blowing it up without getting caught was also great.

If you don’t wanna do a full playthrough, can always just load a save before another route’s point of no return.