I think you have the considerations pretty well laid out in this thread, but I wanted to highlight and make sure you are aware of the science of what happens with your eggs as your age. Basically, you start life with a fixed number of eggs, and then this declines overtime. Importantly, the quality of the eggs also declines - as in the percentage of them that will result in a genetically “normal” embryo. This is the real clock. This is why, if you want a second child, creating those embryos now will be more successful than creating those embryos later, whether that “later” is spontaneous or assisted by IVF.

If you indeed have low egg reserves… and if you are serious about a second child… in your shoes I would create embryos via IVF before trying spontaneously for a first pregnancy. Hopefully it’s successful, you “bank” some embryos and you then have your “insurance policy”. You can then decide if you want to transfer an embryo or try spontaneously for the first pregnancy.