Just share with your friends, if you have someone who is a content creator you can offer him some type of position such as the well-known "Partner" rank, giving him some extra advantages so that it also serves him when making content. Just do not spam other servers, it is something very old and really something dirty that could damage the image of your server
RE: Minecraft server marketing options? tricks/tips
Just share your server with your friends family etc. Find a really small youtuber and get them to play on the server. Use minecraft voting sites and server lists to get players. That's it.