Use the name and pronouns a person asks you to use instead of deciding from appearance or a profile photograph. TransHub's pronoun resource explains these words as part of referring to someone respectfully. In dating, the practical task is to apply the person's instructions in the situation you are actually in.
Ask without making someone perform an explanation
A short question can be enough: “What name and pronouns would you like me to use?” You can share your own without making their answer compulsory in front of a group. Ask privately if the setting makes a public question awkward.
Do not request a previous name as confirmation that you have understood. You need the name to use now, not a history of how it was chosen. If a profile and a message use different names, ask which applies instead of deciding that the difference requires an investigation.
Check the audience when it matters
Before meeting relatives, friends or colleagues, ask how the person wants to be introduced there. Do not assume that permission to use particular wording privately is permission to disclose identity information publicly.
For example: “How would you like me to introduce you at dinner?” leaves room for the relevant details without asking for a list of everyone who knows what. Follow the answer without adding an explanation of the person's background.
Practise ordinary sentences
If a pronoun is unfamiliar, practise it in a few everyday sentences on your own. The aim is to become fluent enough to continue the conversation, not to make your date repeatedly coach you. Ask a brief clarification if you genuinely do not know the form.
When you make a mistake, correct it and continue. A long apology can shift attention away from the person and onto your embarrassment. If the error keeps happening, put effort into practice rather than treating another apology as the whole response.
Keep corrections private when appropriate
Ask before correcting someone else in a way that could disclose information your partner has not shared. There is a difference between using the right words yourself and announcing why another person's wording is wrong. Agree on what help your partner wants rather than assuming you should speak for them.
Further reading
TransHub: pronouns. The examples above concern everyday communication and introductions, not a requirement to disclose identity in every setting.