David's book is notoriously a reference as it takes you by the hand and guide you through the learning process on a logical step by step method.
Additionally, the author hosts and attends very actively this very site.
Besides, many other attendees (like myself) will graciously try to help you along the way.
Logic will permit you to record (up to) 16 different MIDI instruments at once, providing that you connect them to a MIDI interface.
I don't know if you can record at the same time audio and MIDI. But I would believe so.
LogicPro 10.6.1 ( & 9.1.8),MainStage3.5.1
MBPro 17", Core2Duo, 8G, OSX 10.12.6
MacPro, Xeon 6Cores, 64GB, OSX 10.15.7
ULN8, MOTU MIDI TP-AV, C4, MCU Pro, KorgNano, Novation SLMkII
AAS, NI, Celemony, Spectrasonics, Korg, etc...
PC, iPad3(V-Control & LogicRemote), AtariST(Notator SL), Several vintage gear