Hello there !! Welcome, I'm new too haha. For mods, you have an amazing selection here, there is a topic describing the best of the best, also there is a Sticky somewhere with every public mod here.
Then you could also get some more mods from Nexus, generally speaking both here and there have great selections. I have plenty from both.
Also, like roflcopter117 said you should learn how to use some of the modding tools for the game. I would recommend reading about it and watching some vids on how to improve your modding skills (and maaybe just maybe you might even get yourself into modding).
Now, about the MW2019 mods. You should read about this, third sticky:
- Spoiler:
https://www.nexusmods.com/fallout4/mods/46893/?tab=posts
1:
- Spoiler:
https://www.nexusmods.com/fallout4/mods/45174
2:
- Spoiler:
https://www.nexusmods.com/fallout4/mods/46640
3:
- Spoiler:
https://www.nexusmods.com/fallout4/mods/47936
4:
- Spoiler:
https://www.nexusmods.com/fallout4/images/185331
There are plenty of MW stuff out there, all you gotta do is search a bit
hope that helps and again, welcome !!! Hope you stay, just like the motto says:
Come for the Mods, stay for the Community !_________________
"I won't scatter your sorrow to the heartless sea. I will always be with you. Plant your roots in me. I won't see you end as ashes. You're all diamonds."