Hi and welcome to the forum. Any DE razor blade will work but each razor is a little different and each brand of blade will feel different too. Some blades are sharper than others. Some are harsher and some are smoother. I would recommend you try a sampler pack of blades from one of the many online dealers and see which work best for you.

As for razors, you generally get what you pay for. The very cheap ones are manufactured with little to no quality control. I would recommend starting with an Edwin Jagger DE89 or similar. It is a forgiving razor and well made. It will give you a predictably smooth shave. You may find that it is everything you need or you might explore and try other razors. Also, there are a lot of members here who swear by the vintage razors. Eventually you may try a second razor. Then you start trying different blades again. Each combination feels a bit different. Watch for member sales in the Buy Sell Trade forum. You might just find what you want.