hmm
i done it mirror method, comes out roughly 60mm
im practically blind, but my right eye is even worse, my pupil is a lot smaller, , and its difficult to read the ruler !
So we have a rough Estimate of your IPD at anywhere between 55 and 70
With the Original Oculus Quest you can adjust the IPD to exactly match your IPD, The Quest 2 three IPD positions covers a range of IPDs which doesn't work for some people.
The Quest 2 has more room for Glasses and comes with a Glass spacer.
Quest 2 is more comfortable, better picture, better sound and will be the focus of developers going forward.
Don't worry about space, as long as you have enough room to stand up and swing your arms you can make it work. Plus there are a good few seated experiences. And, there is more to do in VR than play games. Watching movies is one. Micro Monsters Narrated by David Attenborough is a must watch.
I guess what I am trying to say is that I would save for a little longer and get a Quest 2.
Have you tried VR before at all?