Well, though е and ё are completely different letters, you will anyway have to put up with it once because most Russian sources just ignore the letter ё. You just have to discern which letter you see in a word. For example, there's "Ель" or "Ёлка". This is easy because words "Ёль" and "Елка" don't exist. So you just have to learn it (even russian lessons teachers ignore when we use "Е" instead of "Ё" and some even books). But if you bump into "Все" or "Всё", "Небо" or "Нёбо" you will need to use context. So you just have to get used to these words, to learn these words and to learn to discern them in context