My experience is when learning something new it takes time for your mind and body to get used to routines and excersises which have not been experienced before. Don’t be too hard on yourself , persevere it will all come together with practice and in time. if struggling have a break and come back fresh to make further progress . Further, it is much better to learn a technique or piece of music slowly and in small stages , to nail each part perfectly before moving on to the next section. This gives you a much more solid grounding and stops you from developing bad habits and learning things wrong .

Small steps become strides as you travel through the learning and most importantly have fun !
markjay