I know digital marketing (self learnt). Now I want to start it as a side Hussel. Where I want to manage digital campaigns for small and medium companies. How should I approach them?

start with small startup firms employing digital marketers. learn customer acquisition, build credibility, then venture into freelancing/practicing solo

Learning digital marketing and practicing it are two diff things... it's not as easy as it looks. Companies look for people who have been there and done it.

Reach out thru aany contact first. Offer tour aervices for minimum amount and take your contract on profit sharing basis. If it was sucesfull for your client , you name will spread and give you the break. It worked for a friend of mine. Now i hear that many have opted this model.

"Hustle"

Try for local vendors, pitch them a small deck on how to get them online, banner making and build social media presence. Other than that cloud kitchen, online coaching seems a pretty easy sector to start with.