Welcome to the forums. Its not as daunting as it first seems, once you get to understand how things work and get yoiur head rouynd the desk.
best way is to start playing and learn as yoiu go.
list your equipment and i can give a rough guide.
Im not a ighting engineer but through working inhouse in a venue that only has 1 engineer to do both sound and lighting ive picked up alot.
Generaly par can dimmers (for me anyway) go first. we have 2 dimmer units which take u p 6 channels each. first dimmer unit is set to start at dmx adress 1 then the 2nd set to 7
we also have some scanners. 4 which are 4 channel and 4 which are 6 channel. so those get assigned with a starting address and each next unit set at the next free dmx address. so say the 4 channel light starts at 100, the next 1 will be set to 104 (as each unit uses 4 dmx channels. so 100 101 102 103 are used by the first unit)
patching dimmers on the desk is easy, simple ass assigning numbers to channels on the desk.
when it comes to lights with more functions like scanners, scrollers, moving heads etc its a little bit different but not too difficult. Read the manual section fictures. the desk has configurations for alot of fixtures so it can be as simple as selecting the fixture, assigning it to the fixture section then giving it a dmx address.
if your moving lights are less commen, you may need to make a fixture file, which you can do with simple pc software and load it to the desk with a usb memory stick.
first thing to do probably would be to update the desks os