This seems to be quite the pastoral problem. Pastors need to get better about answering this question for the faithful, because it is an increasing concern, especially with regard to those who are elderly.
In short, to answer your question, like everyone else, no it is not a sin. The Church removes the obligation in such conditions.
But where does this leave us? More often than not, if you’re genuinely asking this question, Sunday feels quite empty without the Mass. However, we do live in the 21st century and Mass is broadcast on TV stations (i.e. EWTN).
If, for some reason you missed the televised version of the Mass, then perhaps try meditating on the readings for Mass, making a spiritual communion, and spending some time in prayer.