Firstly, drop the "shemale", there's not much more degrading term than that... Being a feminine man is totally fine without using some pornbrained misogynistic terms that are usually used as a slur for a transsex woman.
Secondly, you seem to be asking quite a lot. The body changes you want would probably require conventional HRT rather than NBE as supplements and herbs alone will not be very potent. Also, if you go on HRT to achieve such changes, you will have extreme trouble mainataining male function. You cannot be both at the same time, that's not how our bodies work.
This is something that keeps on being repeated endlessly here on BN, men wanting female secondary sex characteristics and they think they can without sacrificing their fertility and erections. Answer is no you can't, not very well, not easily. Dancing on the fence with this is difficult, you either have full male function or you have full feminising body changes, but getting both is near impossible, something has to be sacrificed in that case. Maybe you want to look into bovine ovary and weight cycling along with exercises to accentuate lower body, but keep in mind BO works only for some people and some do not benefit from it. Also keep in mind that if you go on PM, you might get small boobs, but not much else. For full body feminisation you will need hormone replacement therapy and that WILL mess up your male function and can harm your fertility.
So you have to choose what you want, you can't have it all, and also if you want to be sure that your fertility isn't compromised, steer clear of all this. Do not play with your hormone balance without careful consideration. Doing that for just a fetish would be extremely dumb. Also, with exercise and breast plate and hip padding, you can easily do what you want without actual body changes and messing up your function. If your interest isn't much deeper than that, crossdressing could be more your thing without compromising fertility and function?