Anus is a good place to penetrate which do not have gender difference. Some people is used to anus penetration while some people not. If you are going to sleep with a transgender person, try to get used to it, It will hurt first, but when you get used to it, you will find it just as good as vagina. The most important is that anus penetration is a good way to make love without gender difference and it is a good way to show gender-affirming.
Deal with the body change.
Transgender women are assigned with androgen when they were born, while they try to suppress it by taking estrogen. In such case, their male genital usually will not be able to erect when it needs to. As for trans men, they take androgen and suppress estrogen, which will effectively influence their vagina by making it dry and wither. However, all of these are curable. There are ways to change that if you prefer. They can take some external estrogen or androgen to keep their vagina wet and nice as well as erection. If not, some medicine will do if that is what they want.
Be healthy.
If you are suggested by your doctor to check your body on a regular basis, remember to do that even if some certain parts are not useful to you. For example, if you still have a uterus, you have to check if it is healthy because despite your gender identity, you can still catch many gynecopathy. If you still have boobs, make sure you don't have breast cancer or other diseases that matters. If you have a prostate, check it also. Only by doing so, can you notice the changes of your body and make sure you are safe with it.
Do not afraid of things you like.
Many transgender people are deeply wounded by such idea. You have to face and accept the fact that you are different. Different does not mean bad. It is absolutely okay and normal that you like different things due to the differences. Embrace yourself and your preferences. Do not be ashamed. Only when you are really happy and satisfied, can you accept and embrace yourself. Some day, you will find a person who also likes things you like and it will be wonderful to have a trans dating with that person.
Tell your partner what is good for you and what is bad.
The situation varies for different individuals, let alone different transgender persons. Your partner might try his/her best to educate himself/herself, but face it, not all things can be learned from internet or other people's experiences. If you really want him/her to know you, you need to tell him/her. Instead of guessing and fearing that it might or might not hurt him/her, you might as well tell your partner directly. Be straight-forward and honest with each other to build a relaxing and trust-worthy transgender dating relationship.