And in the end, my simple version turned out like this.
I still want to practice more, so I'll accept PNGs from you guys :>

🍨✧︶⊹︶꒷˚︶⊹︶🍨︶✧︶⊹︶꒷✧🍨

◜๑˚⊹ This is just for practice; you can use the thumbnail on YouTube if you end up liking it.♡

/ᐠ > ˕ <マ ₊˚⊹

If you'd like to participate, I'll need: PNG images of your character.
( or, if you prefer, it could be a Google Drive link )
The text or game name you want on the thumbnail.

🍨✧︶⊹︶꒷˚︶⊹︶🍨︶✧︶⊹︶꒷✧🍨

/ᐠ > ˕ <マ ₊˚⊹

Hi! I'd like to practice creating simple thumbnails for YouTube,
because I only know how to make detailed thumbnails.

🍨✧︶⊹︶꒷˚︶⊹︶🍨︶✧︶⊹︶꒷✧🍨

◜๑˚⊹ Could you send me artwork of your oc ?
With text for thumbnails or game names . ♡

/ᐠ > ˕ <マ ₊˚⊹
More examples
✧︶⊹︶꒷˚︶⊹︶🍨︶✧︶⊹︶꒷✧

/ᐠ > ˕ <マ ₊˚⊹
Hi, my name is Neniis (Neapolitan)
I'm a Neapolitan baby fox
✧︶⊹︶꒷˚︶⊹︶🍨︶✧︶⊹︶꒷✧

I'm also a beginner graphic designer
focused on the vtuber area.
Here are some examples of my work
✧︶⊹︶꒷˚︶⊹︶🍨︶✧︶⊹︶꒷✧

⋆˚࿔ 𝗗𝗜𝗩𝗨𝗟𝗚𝗨𝗘 𝗦𝗨𝗔 𝗔𝗥𝗧𝗘 #BRart ࿔˚⋆

➜ Se apresente ₊⊹
➜ Mostre sua arte ₊⊹
➜ Mostre sua tabela (se tiver com commissions abertas!!) ₊⊹
➜ Marque alguém para participar ou divulgar a arte dele (se quiser!) ₊⊹
➜ 🚫IA🚫 (OBVIO) ₊⊹
➜ NSFW apenas censurado!! ₊⊹

⊹ ࣪ ˖┆♥️ + 🔄 Para alcançar mais pessoas!!

🍨I don't really know what to say, except that I'm a Neapolitan fox, a beginner graphic designer. :D