While many here will tell you you are doing too much, you will have a grand tour of train stations & Europe from inside a train, the rail pass is more expensive, you need to pay reservations on many trains with the rail pass, etc I can tell you my husband & I have done this type of trip several times. Most recently last May - we had a 30 day rail pass and traveled a similar route. Not once in 30 days did we need nor make a reservation and we were able to travel on many fast trains not just regional. In France and going to Amsterdam you will either have to pay the reservation fee on a TGV - which sell out quickly) and Thalys or take regional trains which will add a little time to your trip but not a lot of time - we took regional trains. Twice we encountered trains that were full - going to & from Innsbruck to Venice - we just sat in the restaurant car and ended up meeting some fellow travelers and enjoyed the trip together! The Austrian Rail has a great & very reasonably priced menu - we had lunch and beer & wine and great conversation with a couple from Australia.
We love the flexibility the pas gives us - we can choose to stay an extra day, leave early, add a place or delete a place - for us that ability is priceless. We enjoy the time on the train seeing the countryside, meeting other travelers, I would update my travel blog offline then send it when we had wifi again. We enjoyed several picnics on the train as I usually had a bottle of wine in my bag and carried two wine glasses with us. I also carried a supply of small paper plates, eating utensils, a small sharp knife for cutting fruit & cheese and an ample supply of ziploc baggies in various sizes. I also had a small coffee maker, coffee, creamers & sugar.
You did not say what time of year you are considering - definitely avoid high season June - August.
Access to the DB site & maps while traveling is necessary to do this kind of trip. You will easily be able to find a route which does not require reservations - you can always pay for a reservation if you want as well.
I would make a reservation for hotel for the next stop the night before we left our current city. I tried to book locations near the train station to avoid lugging bags on local transport and for easy arrival & departure. I used a combination of Google maps, Trip Advisor, booking.com, here & Venere for finding hotels that suited us. I always booked directly with the hotel - in some cases we received a better rate or a free welcome drink for doing so.
You will need to set aside time for laundry a few times along your way - there is a nice in Munich near the Hbf. Pack light! Pack light! Oh - did I mention pack light! Light weight things that dry quickly are handy to wash in the sink and hang to dry by morning. When traveling this way we find the packing cubes help keep everything neat in your bag. We traveled with a carry-on bag each, I had a big purse & DH had a back pack.
The "warrior" method of travel is not for everyone but for us it gives a taste of many places and we can then decide where we want to return for a longer stay in the future.