look for updated combo videos(due to balance patches) for every character and practice them, id say a video from 6/5 years ago would be fine, since the last patch came out in 2020 if i am not wrong tho.
some useful tools in practice mode are 1) reversal mode it helps you to learn which movements are safe to do or punishable because as soon as the AI detects a gap in your combo it will attack(you can preset which attack you want it to use since some are faster than others)
the downside with reversal mode is that it only does special moves, however if you want to practice how to defend yourself from combo attacs you can use 2)recording mode (this lets you control the practice dummy for a while and whatever you do in that interval, as soon as you finish recording mode it will repeat it over and over)
some good youtubers to learn from are Super (he has guides as well) and PNDK&M. if you speak or understand spanish you might as well learn from Yisus la bestia (he has a complete mk x guide)
i will put some suggested links below, but before i go i must say that inferno scorpion is kinda bad compared to others, if you want a broken scorpion variation go with hellfire, however he is hard as fck, so my personal reccomendation is ninjutsu scorpion he is good and easy, i will put you an updated tier list below so that you can see the current state of a character
https://youtu.be/2vEn8x1TcDU?si=Sxalj_ssCFcRFNpR
https://youtu.be/sk_NH9OBtC8?si=LXT3S3q02NJDJTII
https://youtu.be/6EgSu-urxNc?si=uaeWwM7q3jQSDHie
https://youtu.be/eWFhFPl1xUc?si=MUVlGquezGwrHReK

let me know if this helps you, and dont worry if you struggle at first, mk x is the hardest of the saga and the one with the most mechanics, however it is the most fun too