Besties should I change my server to SEA?

So 5 years ago, i started playing lol, and made an account in the NA server. I live in Sri Lanka currently. Soo the ping is like 290-300 ms. And I selected NA because of the language and since it's popular for ranked.

So yesterday, my brother, whose acc was in NA too, changed region to SEA. And the ping was like 35 ms which is a huge difference. I tried playing there and it was soo smooth and I liked it.

And now I'm thinking about switching, but I don't wanna lose the ranked experience and everything else there (my acc is lvl 902 btw). So is the ranked quality good there? And should I swap? I want to reach grandmaster or some higher rank and I only peaked plat 1...T-T