I am currently a college student and taking Ukrainian (elementary/intermediate). This is my first time learning any Slavic language, and I'm often asked why I chose to learn Ukrainian rather than Russian. It's a variety of things, but really I intend on gaining proficiency in both. However, I do want to start beginning my path on learning Russian as well. However, I wanted to ask those of you here that may understand both or are bilingual in other Slavic languages whether or not it would be wise to learn Russian concurrently with Ukrainian, or if I should wait till after this course in Ukrainian and then take Russian.
I was considering doing my "introduction" to Russian via self-study, rather than enrolling in a formal course. And then probably taking Intermediate Russian as an actual course.
With that said, I hear many different opinions on how different the two languages are. Granted, I know grammatical rules differ a decent amount. But for me the hardest thing going into Ukrainian was learning to write and the logical structure of sentences. So I feel like those would be similar in Russian, and that I wouldn't be nearly as lost going into that language. Anyways, for someone that is familiar with Ukrainian (in your opinion) what would a prospective timeline be to also gain a beginner proficiency in Russian, as compared to someone taking Russian for their first Slavic language?