3-column preview card component challenge on Frontend Mentor

This is my first challenge using bootstrap. The major focus for me was to learn build this while learning bootstrap. It took me an approximate of about 2-3 hours to complete, due to the fact that I had to learn while making. The only known thing i didn't add is the font which was requested.

Please feel free to check my code and confirm I made a mistake somewhere .

I hope to hear from y'all! ✌