With the 18" dish you should be able to get NASA, Angel One, and ION on 119W from Dish Network. They don't encrypt these channels, but you do need a circular LNB to get them. If it's an old Dish Network dish then it should work as is. If you are trying to use a linear LNB, then it won't work for those channels.
Signal strength refers to the connection between your dish and your receiver. The Quality signal is what you want. It refers to the signal you are receiving from the satellite with your dish. You need at least a 30 Quality signal or the video will be pretty choppy.
First, you have to bring a small TV and your receiver outside with you to align the dish. You need to see the meter on the receiver as you move the dish so you can peak your signal reception. Be sure to turn off your receiver using the switch on the back (or just unplug it) before connection/removing any coax to/from your receiver. If you don't remember to do this, your receiver could get fried.
Go to
Satellite Finder / Dish Pointing Calculator with Google Maps | DishPointer.com and find your location. It will give you all the angles you need to align your dish (skew, elevation, azimuth).
Set your skew first, and make sure you are turning it the right way. Next, set your elevation. Then very slowly move the dish back and forth around the azimuth (east-west direction) you need. If you don't get anything, move the dish up/down 0.5-1 degree and try again. Shouldn't take long before you lock on to a signal.
On your 18" dish, use a LO setting of 11250.
On your 32" dish, use a LO setting of 10750.
You will need a Diseqc 2x1 switch to connect both of the dishes to the same receiver. They are cheap, check our sponsors or ebay.
Also, check the FAQ section. It will help a lot.
FTA / MPEG2 FAQ's - SatelliteGuys.US
:EDIT:
I just re-read your post and see that you bought new LNBs. What brand/model are they?