You have multiple options to choose from. Here are the things to keep in mind while starting freelancing in Pakistan:
Choose Your Skill
Make a Brand for Yourself
Create a Portfolio
Create Contacts
Use Online Freelancing Sites
You can choose Fiverr, Upwork, and some other platforms. Fiverr is the best option if you are a beginner.
You can also post ads on OLX about your expertise. You will soon get some freelance work.