Let me start it out with this photo.

I mean, it is self explanatory. Here are my thoughts on this.

1. Your grades don't matter as much as it used to. Your skills do. You can have 5 GPA but if you are good at coding or one domain in which you are very good at (it can be anything), people will hire you.
2. Arrears are still a black mark but not as much as they used to be. Everyone deserves a second chance and this attitude is slowly changing that having an arrear means your life is at an end. There are good companies and startups who are willing to take chances on you. I have worked with people who have had 2-3 arrears back in their college days but right now, they are masters of their trade with high levels of respect!
3. Take a certification, learn the concepts, don't post that certificate on LinkedIn or as a status but rather put it in your profile and then develop something useful with what you have learnt and showcase that in your profile.
4. Don't keep posting your certifications. It will only earn you a solid mute from many of your connections or even an unfollow. Some even get annoyed and block. Put those certs on your profile and anyone who's looking into your profile will see it.
5. Participate in hackathons. Develop microservices and host it on AWS. Do something which shows me that you know your way around tech and not just a digital paper which says you have done so and so certification.
6. Teach your juniors via some sort of program in your college. Approach your professors and tell them you are interested to hold a talk for all your juniors in a domain which you are comfortable in. I did the same thing and it helped me out a LOT.