How to learn c language
Start by learning C++ https://www.sololearn.com/discuss/459759/?ref=app
Use Visual Studio https://www.sololearn.com/discuss/410578/?ref=app
There are tons of free/paid resources online. You can start by reading the book 'learn C the had way' If you don't want to spend money right now, go to 'tutorialspoint', it's free and very comprehensive.