Pinta 1.7-2 is in the official Manjaro repos. Simply run
sudo pacman -Syu pinta
You should make yourself familar how to install packages. First step should be to look into the official repos. If nothing is there then second approach could be lookig for AUR packages. And certainly flatpaks could be considered. Every way (starting from AUR) requires to understand what issues might be involved. The wiki pages of Manjaro and Arch are pretty helpful in this learning process.
[xxx@xxx ~]$ pacman -Ss pinta
community/pinta 1.7-2
Drawing/editing program modeled after Paint.NET. It's goal is to provide a simplified alternative to GIMP for casual users
ur second command ran through and at the end i got this
==> Warning:
-> Kernel has been updated. Modules of the current kernel
-> have been backed up so you can continue to use your
-> computer. However, the new kernel will only work
-> at next boot.
(22/25) Updating the info directory file…
(23/25) Updating the desktop file MIME type cache…
(24/25) Updating the MIME type database…
(25/25) Updating the vlc plugin cache…