I think it depends on yourself. My first fresh, I did a delayed transfer (FET) the very next month and I BFP-ed.
I just did my second fresh with delayed transfer again and wanted to do FET the very next month. We monitored and then maybe because I was so stressed and all, my lead follicle shrank before my LH surge. So we aborted the cycle. I decide to rest first, go for a holiday and do it in Jan next year.
So maybe ask yourself, after your first cycle, are you mentally/emotionally/physically read for FET now? Or do you want to rest first? Eg. go year end holiday etc. Or if you feel you should tiow your body first then go for that first. At least when you do your FET, you feel more confident!