Coming from c-dramas, maybe
To Sir, With Love - very well written historical (1940s) lakorn with multiple story lines, one is a romance between men. Hopefully it's still on one31's official youtube. Thailand.
I Feel You Linger in the Air -gentler, set in the 1920s, semi-lakorn, more focused on the men. This was on youtube too. Thailand.
Meet You at the Blossom - produced in Thailand to get around censorship but with a Taiwanese director and Chinese actors. I've not seen it and have heard mixed things about it. Try Viki.
Lakorns are melodrama but aside from some movies, Thai directors are mostly allergic to sad endings. Everything will be amplified and exaggerated en route. And if you laugh out loud, that may well be intentional - they mix in lightness and fun along the way.
Most BL series are much shorter in length than epic long c-dramas so they necessarily have a different way of telling their stories. It's worth adapting to each.
Japan can pack a lot into 8 or so 24 minute episodes, but background needed to understand the characters might only get a sentence or two - you'll get more story out of them if you're paying close attention to small, understated details. Japan's speciality is repressed yearning. My favourite is Bokura no Shokutaku (Our Dining Table), with the World's Cutest Kid and Most Adorable Wingman to add light and fun as the older ones slowly figure things out.
The Japanese Cherry Magic is a good one to begin with too. It's a classic.
Taiwan's are also short. My rec from there is See Your Love - great comedic use of tropes (including bad guys it refuses to take seriously) and a lovely, mutually supportive, understanding relationship.
Thai series are almost always longer and there's a much wider range of approaches. Not Me is excellent - there's one bit near the end which might seem implausible but is based on something which actually happened.
Aof Noppharnach (who is gay himself) is my favourite director for Thai BLs, with Moonlight Chicken, He's Coming to Me and Last Twilight. Bad Buddy is a good one to begin with too. Parts of the fandom get really weird about the actors but that's easy to avoid.