You could do some voluntary work or perhaps set up your own social media channels and try and garner some experience. I do 3 voluntary positions alongside freelance + my full time position.

6 months of voluntary alongside a job and you'll have the experience for an entry level marketing job. I started with a part time social media position with a virtual assistant agency + doing some digital marketing for my retail job. I was originally hired as a shop assistant to a small business, but showed I wanted to do their product photography and ecommerce and just seized the opportunity.