Just took a free test provided by Veritas Prep and scored a very poor score of 490!

I didn't prepare for it as I wanted to set a benchmark as to where I stand currently. I noticed I can do far better on quants and found it quite easy but made a lot of silly mistakes. But what scared me was verbal! I didn't know what I was supposed to do in sentence correction but I did get a lot of tough questions correct! Even after getting a 490, I set a target of 750+ either way because I believe with a properly structured prep, I can definitely achieve that score!
Resources that I currently have:1)
Magoosh Quants
2) Veritas Verbal
3) Digital Codes of OG 2021 and Verbal + Quants Review 2021!
Please suggest to me if the above resources are sufficient and what should be a proper strategy to achieve the target score in the first attempt itself! Also, suggest to me the ideal prep duration!
I can give my whole day towards the prep as I am not working currently and have all the time in the world, at least until April 2021!
Any help would be greatly appreciated!