You might consider a contact form, there are many threads to be found assisting you with this topic, however, in answer to your question, what you need to do is to insert the email address in a text box, select it and go to insert, then choose link, choose mail and this will then provide your address as a link, it will then open up your computers default mailer, such as outlook etc., Some people may not prefer this. You can also just have your email address in a text box that people copy and paste into their email program of choice ...
If you are linking your email address as in the first example, it is a good idea to encrypt it at
www.dynamicdrive.com
If you go there and look and read the instructions you will know what to do and how this helps with avoiding spammers reading your email address.