Talk about your sexual preferences and don’t forget that consent is key: when it comes to intimacy and relationships on a broader scale, consent is not negociable.
Make sure that your communicate with your Crush and that you both know your boundaries and respect each other's decisions and limits. Consenting to one thing doesn't necesarily means that you consent for other things: for example going to someone's place on a first date doesn't mean you have to have sex with the person on this night. Also kissing someone doesn't mean you are allowing him/her to touch you or undress you.
And last but not least, if you gave your consent once, it doesn't mean that your are giving it everytime. The best way to know if your Crush wants the same thing as you can be asking him/her the question directly: avoid any surprises and misunderstandings and you will enjoy knowing your Crush even more.
Also remember, consent can change and can be withdrawn anytime. Even if you feel that it can be frustrating, it is normal that people change their minds and it is not something that should neither upset nor surprise you. If you feel that your Crush is uncomfortable, showing signs of being hesitant or is under the influence of drugs or aclohol, don't push him/her and stop immediately.
Digital consent is also a thing: being behind a screen doesn't mean you shouldn't respect what was mentioned above and doesn't give you the right to act differently than in real life.
If you ever want to send sexual content such as nudes, ask your Crush first if this is ok and consented. - Protect yourself and your Crush.
Remember that using condoms reduces the risk of contracting and passing on STI’s like HIV drastically. Get informed about the different contraception methods that can suit you as well as how to protect from STI's. Get tested: some STI's don't give symptoms, and it is therefore important to regularly get tested, so that you and your Crushs are safe.