I think all the posts have been good so far. In the end, you can't really go wrong with the things you are thinking about. As NDH said, it is hard to really know without seeing footage of you playing.
Nevertheless, without seeing footage, I agree that Primorac Off- or Korbel may be a better blade.
I personally think Sriver is fine. But I also think Airoc's point about Roundel is a good one. Roundel may be a very good rubber to start with coming back.
And with a Primorac or a Korbel, that is a blade you can use for as long as you want. There are players in the top tiers who still use both of those blades. But they are also both blades that afford you enough control that someone coming back from 15 years off from the game would still be able to start again with them. They are blades that help you feel the ball so your touch can come back faster; They are blades that help you generate more spin; And they are blades that have enough gears so they won't be too fast but when you add impact power they will be fast enough to put the ball past anyone.
With the issue of rubber thickness, I agree with what Yoass said about thickness. I would also say, if you intend to loop, even if right now you are not looping yet, I would still go with Max thickness. For the FH, for the BH, I would go with Max unless you really don't want to develop the ability to loop with one wing or the other.
I know there are different opinions on rubber thickness. So, I am okay that there are those who disagree. But there is a reason Werner Schlager has said many times before that if you want to develop your game and loop you should never use a rubber thinner than Max. I may not say it in as extreme a way. But, if you want to develop your looping game, it would be worth using Max thickness. It will ultimately help you develop the precision to make deeper, mid and more shallow spin contact while spinning the ball.
Someone who already has that skill of how deep to let the ball penetrate into the topsheet and sponge can utilize those skills with any thickness of rubber. But if you are trying to learn to loop, Max thickness will help you develop that skill.