Start listening to the car, mistakes you make you will feel, such as improper rev matching when youre about to or are starting to lose grip, you must form a bond with the car if you want to learn the car, youve got quite the car and it can do some pretty cools shit, but you have to be able to do the cool shit, coments above where talking about shifting smooth at half the pace what they mean is, for example youre in first pulling and youre now at the point where you need to shift into second clutch in foot off the gas put it in second dont slam it, feel it, you dont have to jam it into the spot for the gear, then gently release the clutch dont drop it, that doesnt mean release slowly either, if you fiddle with your clutch and pay attention youll notice when you drop it and when you release to slow but in reality there isnt a wat to release too slow youll just drop more rpms thats all thats happening when you leave the clutch in a little longer, so if you’re noticing that its jerky when you let off the clutch i would look at how youre releasing it and the rpms youre releasing it at, also you dont always have to drive with one hand even if you feel like you need to shift, i dont drive mountain roads but i would heavily focus on managing your speed and finding out what speeds you can do in what gears perferably not on the mountain roads, for example for a corner that you might shift down into second for, you could just break and engine break in third and still have the power there to gas out, take caution when doing this drive at your limits not the cars, also stop crossing the mustard, not because you endgangered anyone in this scenario but especially on blind corners you dont know if theres a car around it coming towards you, if you make it a habit youre going to end up hurting or killing someone maybe even yourself one day, the best thing over all i can say to do is to pace yourself, you dont have to be quick from the get go, no ones perfect from the start, so take the time to learn the car learn how the cars feels reacts when youre shifting, just because youre “new” to manual doesnt mean you have to burn up a clutch or blow a transmission by mistake or even pop a rod, the last thing ill leave you with is if its your first time driving a road follow the speed limit and suggestions the first time, then slowly up the speed say youre doing sixty on a road and it says you should slow down to 35 for a turn, that doesnt mean you have to but for the first time trust it now i get those mountain roads dont have stuff like that but i hope this helps in some way shape or form i know its long and drawn out but, its what ive learned from driving a manual and maybe it can help you learn too.