Look for a better deal on a case, better PSU, some 750w+ go on sale fairly often for about the same price as that. Like stated above, the ram speeds should be at least 3000mhz anything less and you're doing yourself no favors. Decent 32gb kits can also be gotten on sale for around ~$130 but 16GB is fine to start.
If you follow Reddit, the subreddit r/buildapcsales is a great place to keep an eye out for great deals. For example there's a crucial ram kit currently cheaper than the one you have but with 3200mhz speeds.
Don't see anything here for storage, but I recommend a SSD for a bootdrive as a minimum. That alone will take any PC to the next level.
Happy building!