Weak core - at home workout ideas?

Hey all! I’ve been climbing on and off for about 6-7 years and have struggled with a weak core since I can remember, but always skirted around it.

I really can’t do much with horizontal sections of boulders or roped climbs because I don’t have the ability to maintain that tension.

Can folks share what core workouts they do at home? I’d love to do something every other day to help build up that strength. I do lift weights but want core stuff for home that isn’t reliant on the gym only.

I have some minimal equipment at home -

-2.5 and 5lb plates

-Ab wheel (too intense for me right now, not strong enough)

-stretchy TRX band

-Bosu ball

Thank you!