There are a lot of problems people face with during a learning new languages. Some of the main problems are insecurity about your abilities and absence of motivation. Nevertheless, I think that people can handle them thanks for finding high-quality lessons and tutors.
Talking about the most common issues, a large amount of people do not know what they should do in the beginning and they do not have a strict schedule or plan. This can lead to trying to learn all at once and feeling overwhelmed because usually people should start with something simple for building fundament of basic grammar and vocabulary. For example, when people find some difficult rules or words and can not understand them, they start thinking that they are not good enough, while, in fact, they just chose not suitable things for their level. This can became a reason why person gave his learning up and lost all of his motivation.
Also, there are some measures which may help people with this difficulties. I assume that a possible solution would be to find a tutor with huge work-experience or the decent courses since they would make an action plan special for you. Furthermore, teacher’s explaining usually much more understandable than regular lessons in the internet, because couch makes a program based on your gaps, aims and a current level. Another effective way to address this problem is to realize your real goals. Only after this your brain will understand for what you are doing this. For instance, when people start doing something difficult, such as learning a foreign language, just for fun, they give it up more often than people who really need to finish it, because they know what they will get in the future if they learn a new language now.
In conclusion, despite the fact that learning another language may seem too energy-intensive and tough sometimes, in the current days there are a lot of solutions for solving this problem. So, often people should just start with something easy and learning new step by step for making noticeable results.