Since this is a legacy build from 2018, official support for it may be limited. However, you can find foundational guides through these official channels:
The ARCHline.XP Official YouTube Channel hosts extensive playlists for the 2018 version, covering wall creation, roof design, and rendering. archline-xp-2018-r1-v180917-build-670-x64
To run Build 670 effectively, your hardware should meet these minimum specifications : Windows 7, 8.1, or 10 (64-bit only). Processor: Intel Core i5 or equivalent microprocessor. Since this is a legacy build from 2018,
Build 670 (R1) focused on improving the BIM workflow. Key tools in this release include: covering wall creation