What do I do with Modlists

Basically the title
Downloaded a mod list (Last Seed) and got everything except it just stopped downloading on the literal last mod which I just added from online (dont think it's configged) and I spent almost 12 hours doing all this and don't feel like doing it again

Is there an easier way to mod this or just set up the mods I have or something? It's making me more and more frustrated