The Royal Greenwich Observatory are running a series of online webinars and virtual planetariums that you can take part in for just £5! I recently attended the Stellar Encounters one and it was so interesting! I learnt about the birth and death of stars, more about light years, the different colours of stars and exoplanets that could support life (The TRAPIST system is amazing!) Take a look at the link and if you take part in any let me know!
The European Space Agency website has lots of interesting and fun things to look at and explore! Thank you to Jake for the recommendation!