Instagram marketing - help please?

Hey guys!
I'm asking for help today. I try to learn as much as possible about instagram marketing, I think I'm familiar with pretty much, but well - you can always find someone who knows something you don't, that's why I have created this thread for.

I'm selling my products and I'm getting customers mostly from instagram. I send comments, I send dms, I reply to dms, talk with people, engage with them etc. to turn prospects to customers. I've got list of prospects that I engage with daily.

My question is - if you had 10k potential cutomers URL, how would you get them to check what you got in stock? What is the best and the most effective way to get people to know about you? I can send like 40 messages per account a day and I'm not using more than 4 profiles at a time, becaue I reply to these dms after...it would be a lot, a lot of dms if I had like 20 accounts.

I mean, follow / unfollow, dming work but it's very slow.

Do you have any idea how to reach as many potential customers as possible? What tactics do you guys use?

I hope someone will reply tho lol!
Thank you!

research cold sales email articles and figure out what works and what doesn't through A/B testing.