I've been unable to ride for three years now, I tried to push myself too much during the first year and have suffered for it since, including being let go by my employer last month, so I'm now on benefits with no prospect of a return to work in the near future…
so take it easy, maintain some basic physical exercise routine, ride around "the block~" several times a week to keep your cycling legs active but do not end up miles from home feeling exhausted. If you don't feel up to something don't do it, and don't let others pressure you into it. Drawing would be a great idea, there is also considerable benefit in doing things like yoga and pilates according to research. Ask your GP for Vit B12 injections, some benefit identified in research for taking Co-enzyme Q10, 5HTP, NADH and St Johns Wort