Cook a big pot of curry from scratch. Grind spices, let the kitchen fill with amazing scents whilst listening to 6music and dancing around. You get a couple of day's dinners.
Have music themed hours with Spotify, whatever your choice, rock, rave, cheesy belters.
Have you any instruments in your house? Even just bongo drums.
Karaoke machine?
Local Rock Choir?
Find events locally, many are free, or minimal cost, can be anything, picnic in parks, farmer's markets, film screenings or live bands in smaller venues. Should be coming into peak season for summer events.
You can get "unsolved murder case files" games online and can pretend to be a misunderstood detective, you can do these alone or with the teenagers if they want to join in or a bit of both.
Plan and plant a natural hedge for wildlife. Very minimal gardening once in, you can put berry bushes in for food and colour.
Tiedye some older tied clothes for a summer wardrobe revamp.
Buy an actual newspaper and stroll to pub in evening for one or two drinks with the crossword/paper? Never know who might say hello.
Learn and master a magic trick to amuse people.
Watch some comedy, stand up or sitcom
Only watch TV box sets you enjoy
Read some light but worthwhile literature, off you want suggestions for what you enjoy the "what we're reading" chat folk are endless great with suggestions
Have a listen to spoken word/poetry on YouTube and try and make your own one (never had to be shown to anyone).
Start small, see where your ideas grow.