Hi Sarah, welcome! You have found a great site.
18 months is an awfully long time to be on crutches. No wonder you are looking forward to getting rid of them.
For me, Day 60 after THR (ie nearly 8 weeks) was the first time I did all my walking inside my home without crutches. Coincidentally, it was exactly the same for both hips, 3 years apart. I still used at least one crutch outside for a few weeks more. And at the moment I have had to go back to using both crutches indoors, nearly 11 weeks after my second THR, having overdone it last week.
But I am slower than most. I found this upsetting the first time round. In fact, I was so annoyed by the NHS Hip Replacement Recovery web page which then said “Generally, you should be able to stop using your crutches within four to six weeks and feel more or less normal after three months, by which time you should be able to perform all your normal activities” that I asked them what evidence they had for saying that. Not much, it turned out, and they changed their website so it is much vaguer now, and recognises that every recovery is different.
But I think from the various postings on here that a lot of members would be able to stop using crutches by 6 weeks. You have the benefit of being younger than most hippies, but I don’t know whether the time you already had on crutches would make it slower for you.
I think also there would be general agreement that it is better to keep using the crutches and have good style, than get rid of them and limp.
I hope you have had and will continue to have an excellent recovery.