Hi from Italy, I (M24) found a girl on Instagram by the app suggestions. I don't follow many people on there, and noticed that among her 300 friends on the app a lot are aestethically my type.

I already texted her, to shoot my shot, cause she too is gorgeous, but without success.

I'm not overly social on the media but I have an updated profile with cool photos (thanks to my sister). What I'm looking for is for some advice to text like 20 other girls from her friends. Should I do it one at a time? First follow, wait, text, look for some activity?
If there are twenty girls (maybe more) and I text one a week it will take months, if it has higher success ratio I could do it. What do you say?

Never found myself in this situation, thanks for your advice.