It certainly would help if you'd tell us what county you are in, etc. The more information, the better.
The PRO-46 is a 100-channel scanner that covers the usual frequency ranges. It does not do any sort of trunk tracking. So you can't monitor any trunked systems that you might see in the RRDB. That leaves conventional (non-trunking) frequencies. Depending on the area you are in, you may have a lot of conventional frequencies to monitor or you may have very few.
Even if the RRDB has frequencies listed for your area, you may or may not hear any traffic on them depending on a few variables:
1. Does the scanner even work? Have your heard any radio transmissions on it yet?
2. Geographical limitations
If you are situated at an elevation lower than your surrounding areas, you'll likely pick up less.
If you are using only the antenna with the scanner, you won't pick up signals that you could otherwise pick up with an outside antenna
3. Conventional freqs may be seldom used
Depending on the area you are in, even if there are conventional frequencies listed in the RRDB, they may be seldom used if you also have trunked systems in the area and those agencies are also on trunked systems.
Mike