Welcome. It is difficult to simply switch to a straight style razor. There is a learning curve. I'm not familiar with the shavette you mentioned. I like the Parker shavette. A traditional straight is easier to use but much harder to keep sharp. Once you know what your doing, it's really easy.
Honestly, if your looking to switch and price is genuinely an issue, I would be more inclined to suggest you start with a Double Edge razor, a decent brush, and some tradition cream or soaps. There is a learning curve ,but it is much easier. Over time you'll stumble across a decent straight, and a decent strop. Be patient and the cost will be buffered over time. You'll not notice it as much.
Even if you were to start with a straight I'd suggest you, literally, spend the next two months studying the forum and wiki, before attempting to shave, or buy anything. Also, find someone near you that you can get some information and training from, if at all possible.
Straight shaving is a little like learning to sail. Go buy a sailboat and try and sail around the world without lots and lots of study. It'll suck. And you can't cut your face on a sailboat.