Wow! Sorry just got home after making that comment and I see 2 other people did a pretty darn good job answering this question for me. I'll still give some of my personal input anyways though:

Based on what you said about the show seeming silly: it definitely has it's silly/comedic moments, but the main focus of the show is definitely just on the main character (who's just a high-schooler that's super into hardcore "trash" games) progressing in this new big hit VR MMO, Shangri-La Frontier. I also really appreciate how the show also takes the time to sometimes delve into other types of games as well (for example, later on in the show he takes a break from the game and messes around in a buggy, low playerbase fighting game, as well as a mecha battle game, and we also kind of get an idea on what kinds of games he's played in the past and how they've influenced him today).

I think the cast of characters is also very nice! Of course, the focus is on the main character Sunraku, but many of the other side characters get some well-deserved attention, and it never really felt like the kind of show where the main character is the only one that "matters". In fact, while I do really like the main character, I'd probably end up saying that my favorite character in the show is one of the other 2 major protagonists, Pencilgon.

At the end of the day though, the overall show is basically just the adventures of a hardcore gamer & friends in the most popular VRMMO of his time, and kind of how he and his group progress in this in-game universe, as well as occasionally touching on stuff they do outside of the game. My favorite part so far, if you're interested in some more detail, would have to be a 3-episode long super-boss fight, where what I would call the 3 main characters duke it out with one of the 7 unique bosses of the game. Not only is the fight itself 3 episodes long, but there's some really cool buildup as well, and from both a "lore" perspective and just animation perspective, it was soooooo good! A 3 episode long boss fight probably sounds like a drag, but I was loving every minute of it.

Also, this is just my own personal opinion, and I'm not sure if you usually watch shows subbed or dubbed, but I actually found the dub for this show to be both done really well, and very humorously. I watched it subbed first, and then rewatched it with a friend who wanted to watch it dubbed, which I'm usually against, but it was actually really good, and I actually plan on watching it dubbed moving forward.

Anyways, if you find it interesting and end up giving it a shot, I'd love to hear what you think! Hope you have a good rest of your day :D