I think it's a good idea.
'Penso' — PEN-so. Stress on the first syllable. 'Sia' — si-A, two syllables — this is the congiuntivo of 'essere'.
Use to express a positive opinion or endorse an idea. The subjunctive 'sia' is required after 'penso che' — this is a key grammar point for B1 learners.
'Penso che' + subjunctive is one of the most important Italian constructions. 'Sia' is the congiuntivo presente of 'essere'. Using the indicative ('è') instead of 'sia' is grammatically incorrect after 'penso che', though heard in colloquial speech.
Credo che sia la soluzione giusta.
I believe it's the right solution.
'Credo che' + subjunctive — same construction. 'Credo' is slightly more emphatic than 'penso'
Mi sembra una buona scelta.
It seems like a good choice to me.
'Mi sembra' (it seems to me) — softer, more tentative than 'penso che'
Ritengo che sia fondamentale.
I consider it to be fundamental.
'Ritenere' — more formal and emphatic. Used in professional/academic contexts
Italians give opinions freely and with confidence. When asked 'cosa ne pensi?' (what do you think?), the questioner genuinely wants your honest view — a non-committal answer is often seen as unhelpful or even dismissive.