It's no good feeling trapped

Getting out an about is so good for you!
A couple of options I can suggest:
- make it the same time (roughly) each day so that your predictable routine includes a trip out. Whether this is A or S time doesn't really matter, you will adapt the routine around it. You might end up with a pram/car nap habit this way but from my experience habits are made per-nap, so if you do it at the same time/nap each day you are always able to get out at that time and LO will still learn to self settle in the cot at home for the other naps. My DS wouldn’t sleep in the pram and I had times I kind of wished I'd got into a pram habit from earlier one to allow us a bit more freedom. Later he got used to car naps which was very helpful, they were short but at least we got out - and he retained his ability to self sooth in his cot for a full 2hr morning nap.
- when mine had a short A and was having short naps too I got out by preparing everything during the morning nap, then I'd stand by his cot ready for him to wake and literally lift him straight into the sling, pick up my bag and get out the house. I did E and nappy change a short while later once we got to the park, at least I felt like I'd seen a tree, got some air and heard the birds sing. I had to head back home almost as soon as E and nappy change was done because he had to be in his cot for the next nap, it was a tricky phase for us with the short A and short S but it was worth it to get out.
hope this helps some
