Asking what terms are fair for an industrial partnership with a clothing brand.

I'm currently working with a someone who wants to put out merch for his brand. He's the one who will finance everything including the shop, merch production, marketing materials and subscriptions we'll be using to produce it. Thing is, I'm the one who's gonna plan everything like making designs, content, marketing ideas, and social media managing. My partner and I doesn't really know how the splits or compensation's going to work but we settled on a 70/30 split sa sales bukod na dun yung operational expenses and percentage for the capital. 70 for him and 30 for me. I don't know if that's fair tbh but I'm okay with it naman. I just need some advice of how does it usually go. Thank you!

P.S I don't really know much abt business stuff so pls good people of reddit help me 🤝