Fiberglass can be a good racket material for certain playing styles - it provides more flex and a softer, more forgiving feel than carbon fiber. While not as durable, it offers better control and touch.
For a defensive beginner focused on precision over power, a quality fiberglass racket like the Wilson Bela Team could be a great fit. The softer response aligns well with developing defensive skills.
Material is not everything - also consider string pattern, weight, balance, head size based on strengths/preferences. Fiberglass is still competitive for recreational play if you prioritize feel/control.
As a beginner seeking your first racket, don't rule out fiberglass simply because it's not carbon. Focus on features suiting your game rather than judging materials alone.