Hi ! Sadly, IMHO, FBX files may be a bit less friendly than mentioned above.

I've converted a lot of DA's free XPS files to FBX, got free and budget FBX figures from eg CGT & TurboSquid. Some do carry their textures internally, others reference files in a companion folder. If you're lucky, the latter calls are correctly 'relative' to the supplied texture folder. NOT 'absolute', hard-wired to a folder deep, deep in author's F: drive.

Those can be the stuff of nightmare, as PP_11.3 FBX importer seems unable to browse for them. P_12 may do better.

A few misplaced textures is not a problem, but I've spent entire evenings patiently hand-loading 50~70~~90+ via material room. Given its UI becomes increasingly hostile beyond first page, it is migraine inducing...

Some FBX have no texture info, rely on a single, UV-mapped 'drape'. Which, if you're lucky, is supplied and in a format Poser can read.

Rigging is a sore point. IIRC, FBX versions 'in the wild' range from v6.1 through to v7.5+.

PP_11 can usually import v6.x, but v7.x seem to come as 3~~4 different flavours of rig 'tree'. Only one rare v7.x flavour, often flagged as 'With IK', reliably 'plays nice'. The rest 'lose their tree root', may 'totally splat' like an ST_TOS transporter accident or, if you're lucky, arrive as 15~~30 mini-rigs and their free-flying parts. Such may be rounded up and parented to a place-holder via Hierarchy, but posing is non-trivial. Again, P_12 may do better.

Sorry, don't mean to scare you and, as I've said, P_12 may do better than 11.3. Either now, or in 12.1 update...