Base game spectator is pretty basic just following teammates with fixed camera but theres actually some cool mods that change everything up. Freecamspectate lets you fly around with wasd and space which is super useful for learning maps, while deathheadhopper lets you bounce around as your own severed head pretty fun actually. All these work client-side so you dont need to bug anyone else to install them

Most players grab repo enhanced since it bundles all the good spectator stuff together, plus adds some other nice features like team markers. Camera speed settings are in the config files if default feels too slow or fast. Maybe interesting that you can scout ahead for your team while dead, gives you something useful to do instead of just watching

You might wanna practice the controls in a private match first, since free camera can be a bit weird until you get used to it.