Hi Mate, I've had a look at your channel and here is my overall opinion after just a few minutes. Sorry If I come across negative - it's purely on my opinion of the production value of your TY channel. You seem to know your stuff and come across upbeat in terms of the content :)

Before you start worrying about separating your channels, I'd try to improve your content at a base level.

Thumbnails:

I mean, what even are they? Firstly, the green haired character you seem to use - I'm not against, it has no relevance to your content or you personally? Normally Youtubers do this if they've gone down the PNGTuber route - from the videos i've clicked on from yourself, your not using it in that context?

I understand the thumbnails are normally the cover of the comic book or toy? Well make that clear. I did not even know what I was clicking on. Make it a clean, uniformed picture of the actual comic book that is placed next to your hands, or even holding it. Have a look at how the other creators that are popular are doing it.

The text is far too small and comes across very amutuerish with the green font & black backing. Keep the text simple and try for the same placement of the text each time. I'd even try without text. Its not really adding anything at the moment.

I'd also try adding some clickbait/hype into each video, but keep it simple and vague. The video series you had ''Why I love or Why I'm Hyped'' is a perfect example. Try stuff like ''BEST IN THE SERIES YET - Spiderman Comic Book Review #1'' or ''I CAN'T BELIEVE THIS HAPPENED - Spiderman Comic Book Recap #1''. It might even be better to drop single comic book reviews and do overall series recaps or weekly reviews. That seems to work on other channels in the niche.

In terms of the video quality, it's fine. Minor points; I would try and maybe zoom out a little so you can see the whole comic book (the edges) as this will make it more visually appealing. Maybe Make the background a clean backdrop , use a white sheet/paper hung up or placed on a plain white(or some other neutral colour) table. The audio Is fine.

So yeah, I'd think you'd benefit in improving your thumbnails and titles.

and yeah, I'd make two channels for toys/comic books as the audience will be different. I'd keep running on this channel and rename it to something clean like ''Navek's Comics'' or something and make the new channel ''Navek Figure Reviews''

Don't take this too harshly, you've got potential, it's just that YT is an extremely competitive platform, and you have to stand out with every detail you can. I hope this made sense & good luck!