Hello,
I have been strugggling for the past 2 days to find a good free lineart brush on krita for manga drawings , does anyone have some to suggest to me i would appreciate it a lot !!
Hello @Cazy, and welcome to the forum!
This set is said to have good brushes for comic and manga:
Same bundle another LINK:
This is a specialist for this topic:
Mojo Moo for comics
And if you want to search yourself, then take a look at our page for https://krita-artists.org/c/resources/brushes-and-bundles/32, and always scroll to the very end to reveal more and more bundles for Krita till the site says there are no more bundles to discover.
Michelist
Add/Edit: Since Ufile.io seems permanently defunct, I removed it and added alternative download locations.
You can try out the one I use. It’s based on the Syrup Brush found in Procreate. I mostly do western style comics, but it might work for you. It’s a free download on my Deviant Art page: Syrup Brush
I have been using the 2021 David Revoy brushes for a while now. I really like the line art / sketch presets - perhaps you will like them as well 
There might be an updated version, I am not sure. I still use the 2021 pack
Welcome, @Cazy
I hope you find a brush you love.