You need a website. Or, do you really need a website?
Perhaps all you need is to connect for free* via Twitter https://twitter.com or to reach people right now via Facebook for free* https://www.facebook.com or to just write for free on Medium, https://medium.com/ or a bit more via WordPress.com, a free blogging platform https://wordpress.com or perhaps a lot more via a free website on Wix, https://www.wix.com
*Twitter and Facebook have paid advertising.
You could also install your own: https://atihow.co/install-your-own
All the above mentioned free and paid services could get you very far in establishing an online presence, but If you have got this far, you must be looking for something a bit more, something custom. Please get in touch via firstname.lastname@example.org to discuss.