Wow, Jaikab, first of all, I'm so sorry for your loss. You must be reeling.
This is no time for you to have to be making big financial decisions, so I would suggest that the best thing you can do it take the $200k, break it down into manageable increments of $20k, $50k, whatever makes sense to you, and put it in Certificates of Deposit (CD's) that will mature in 6 months time, year's time, maybe up to four years' time, (go with the highest interest rates, within the realm of how far you want them spaced) then when the CDs mature, put them in indexed funds with low administrative costs, such as Vanguard. It would probably be best if you put $100k in one financial institution and $100k in another, so as to divide the risk and be below the FDIC insured max. Also, the stock market is a little high right now, so you are probably safest putting this money into even indexed funds a bit at a time, rather than all at once, so that if/when it drops, you are not risking too much. In the meantime, in CDs, the money will be relatively safe for the short term, and will at least do a little to earn its keep.
Best of luck, and again, I'm very sorry for your loss, which must be incalculable.