Alva has studied at Stockholms Konstnärliga Högskola (formerly Stockholm Opera College), Opera Studio Kapellsberg Härnösand, Lyric Opera Studio Weimar and the advanced development program Opera Pro. During her studies she has studied and sung roles such as Sophie (Der Rosenkavalier), Ilia (Idomeneo), Marie (La fille du régiment), Zerlina (Don Giovanni), Giulietta (I Capuleti e Montecchi), Gilda (Rigoletto), Manon (Manon, Massenet), Blanche (Dialogues des carmélites), Ava (Löftet/The Promise) and Susanna (Le nozze di Figaro). Alva has received a large number of awards and scholarships, among others from Jubelårsfonden, Ester Sidners Fond, TSO Teaterorden and Anders Walls Stiftelse. She also has a great interest in Lied and romance singing. She participated the summer of 2023 in Vattnäs Konsertladas Chamber Music Festival where she performed Schubert's "Der Hirt auf dem Felsen" with pianist Michael Engström and clarinetist Maria Rubio and she sang Richard Strauss “Brentano Songs” on the same stage in July this year. Alva is also a frequently hired oratorio and church singer and has performed with a number of orchestras, including among others Norrköpings Symfoniorkester, S:t Tomas Symfoniorkester, Umeå Musiksällskap Symfoniorkester and Drottningholms Barockensemble.