Dear Language-learning Enthusiast,
One of the problems you could encounter on your learning journey is the unfamiliar form and usage of your language of interest, and this could pose an obstacle in the process of trying to get familiar with basic concepts of the language. For instance, some languages are particular about grammatical genders, others are not.
Languages such as French, Spanish, German, etc. associate some words with gender (i.e., gender-specific nouns).
If you are used to a language such as English where the majority of the words do not change with gender, this could be quite an interesting challenge to overcome. Also, in languages like Spanish where the adjective is placed after the noun it is modifying in the sentence (as opposed to being the other way round in English), learning can get quite confusing.
It would help in a situation like this to PAY ATTENTION TO ALL THE RULES of whatever new language you might be interested in. Constant practice would also get you familiar with new concepts in no time. As we always say, practice makes progress.