We went to a Lazio game our first night in Rome last year for Spring Break for FCPS. My kids were 6th and 9th grade. The 6th grader is a huge Premier League fan and loves all things soccer. We had a great time.
We bought tickets directly from Lazio website. We were staying in a family-run boutique hotel and they gave me this advise re stadium areas:
Lazio is a great team, and the game Lazio Sassuolo is an absolute nice game (family friendly) so if you have the opportunity, that is a game to go!
I would not buy tickets for the "curva" , so I would consider either "distinti" or even better "tribuna tevere" or "tribuna monte mario"
if you want to leave the decision to go or not for last minute, you can do that because I do not think the stadium will get filled with sassuolo (so you might want to wait until you are here to decide)
regarding the website where to buy tickets for Lazio vs Sassuolo, I would go to the offical lazio website:
https://www.sslazio.it/it/biglietteria/prezzi-e-gare
We used a tour company to book all of our other tours etc and they arranged a driver for us that picked us up at our hotel, got us as close as possible to the stadium (still a walk from there) and then told us where we were to meet him for pick up after the game. We were totally jetlagged and know no Italian but we loved every bit of the game and had no issues. We even got stadium food (and my oldest kid has food allergies and they were great helping us through that).
We had been to a DC United game but this was a unique experience.
The only other thing, I think they switched the schedule on us from when we first looked at tickets to when we actually bought them so do check/recheck schedules.
We loved our trip and I'm happy to share other info if you'd like!
Enjoy!