It sounds like things are moving in the right direction!
Are you going to be taking one of the new oral anticoagulants rather than warfarin? I have been taking warfarin for 10 years, but I think the evidence is now in favour of the new drugs and they are more convenient (you don't need to be so careful about what you eat, or need regular blood tests). When I get home from my Devon holiday I am going to ask to be transferred to a
NOAC/DOAC.
The first time round I was off the bike for 8 months, though I could probably have got back on after 6 months. I used walking to get my fitness back. At first, it was walking very slowly for 50 metres, leaning against walls to rest. I built up to going 350 metres to the shops, then back, stopping 3 or 4 times each way to rest. Once I could do it without the rests, I started walking more quickly. When I was starting to feel up to it, I enlisted a very steep path and walked as far up that as I could, turning round when I felt tired/breathless. Eventually, I could get all the way up and added some flatter walking at the top. After a few months I could walk up the steep path as quickly as most people walk on the flat. Then it was time to cycle again... I hope that your recovery goes something like that, without any further complications!