The Real Madrid squad is a good one and they are capable of beating any club in the UEFA Champions League this year. Just as you said, Real Madrid needs a good striker who will help them score goals in a difficult situation, and also make their games to be more enjoyable to watch.
I think it's not as easy as you say because this season there are many strong teams who are ready to compete strongly, such as PSG, Bayern Munich and Manchester City. So Real Madrid must be able to appear consistent when they face representatives from the Bundesliga like Bayern munich because if they are not in their best form then Bayern Munich will be able to beat them.
I think this season still has a long way to go and Real Madrid really needs quality strikers in their front line. Because if they only rely on Joselu it will definitely be quite bad for them. Ancelotti seems to need the right duel for Bellingham on Real Madrid front line this season. Indeed Bellingham is their top scorer this season but he is not a pure striker.