Large size luggage on shinkansen/local trains?

Hi, I'm sure this was answered already thousand times, but posts I could find were 1-2 years old so I imagine some information could be outdated.
I will be coming to Japan in a few days as a student, coming to Tokyo first and then going to Nagano, and I'm bringing 1 large and 1 medium size luggage ,1 carry-on AND a backpack. Where and how do I store these on the trains? I don't think they will fit in overhead because it's large and heavy (luggage 23kg each, carry-on 10kg). I've read here that on shinkansen you need to reserve speacial seats for luggage area, but also on website I've seen that since this or last year it's no longer required? And what about just local trains? My hotel is in Minamisenju. Can I get there with all this luggage on a train and NOT get in trouble, or I just have to get a taxi? From what I seen, I have to change at least 1 train going from Haneda to the hotel, so I'm pretty sure people will be giving me the "looks" if I get on the train with all that lol

by drafthard