HI Ellen,
It's not a dumb question. The answer is. They answer is yes and no. Yes solar returns are used by traditional astrologers. Jerome Cardan and Morin deVillefranche wrote extensively on them. Lilly wrote about them in
Christian Astrology, and John Gadbury wrote a fairly lengthy treatise on the subject. Over on the Arab side Abu Mashar's work on solar returns is considered authoritative.
However they did not use them the way moderns do or the way I think moderns do. Very, very briefly the system works like this:
1) Delineate the nativity. Nothing can be predicted from the solar return that is not in the natal chart.
2) Look for something of significance in a primary direction or secondary progression that will "hit" within the year in question or close to it.
3) Cast the solar return and look for things in the return that are shown in the nativity (easier said than done). The repetition of indications is what triggers the promise of the chart.
Unlike moderns the solar return is considered by traditionalists to "last" from return to return. It does not "begin" months before or "last" months after or overlap.
The absolute best book on solar returns is Volume 23 of Astrologia Gallica by Jean Baptiste Morin deVillefranche. Unfortunately if the reader is unfamiliar with Morin it may be confusing. It is best to read and understand Book 21 first. Both are available in English from AFA.
If you have any more questions dumb or otherwise

please feel free to ask.
Tom