Newbie question about dofollow / nofollow links

Hi experts, I am a curator and along the way I have collected over 1k website links which are in demand in my country. (Have done the keyword research). I am in the process of building a small directory website of other website links. I have 3 questions: 1. Do the links in my lists have to be nofollow? All the links will open in a new tab. I don't have a paid model. If the website gets traffic, the only monetization I am considering is through ads. 2. I understand dynamic search results may not fare well with seo. Should I just create 100s of pages of lists against all tags. Links are categorized and tagged. My homepage has categories listed. 3. Lastly, if someone can recommend a lightweight wordpress plugin that works for listing only websites that can be categorized and tagged. It's not a business directory, I do not need features like geo that most biz directories provide. Thanks so much for reading this.