The very best way to develop your voice is to study voice privately. Calgary has many incredible voice teachers and options to study.
Classical & Operatic Voice: Mount Royal Conservatory
Musical Theatre & Contemporary Voice: Singsana Studios
Jazz Voice & Songwriting: Cornerstone Music
App Suggestion: Acapella from PicPlayPost
Great (free for videos up to 30 seconds) app to create short videos where you can harmonize with yourself, of with friends.'How to' video: https://www.youtube.com/watch?v=WX3imwWmgmc
This collection is now in the public domain. The IMSLP page below has pdf copies of both the Medium-High Voice and Medium-Low Voice books available to download for free.
The YouTube Channel with background tracks for each piece is linked below.
HOW TO APPROACH THESE PIECES:
1. Listen to several pieces in the collection. Select a piece to learn.
choose a piece that feels comfortable for your current singing range
if the piece you have chosen feels too high or too low, look at the other book to see if the other key feels more comfortable (the same pieces are in both books)
2. Listen to several different recordings of the piece you have chosen.
which recordings do you prefer, and why?
3. Find the Background Accompaniment Track on YouTube. Click on the link to find the playlist for both the High Voice and the Low Voice books. Scroll down the page. https://www.youtube.com/channel/UCXW_hkr4WV6Pcii2tt05oiw/playlists
4. Start Singing (sing a vocal warm-up before you start singing). Use a neutral vowel (zoh or zah) to sing the phrases.
pay attention to breath marks and phrase lengths as you sing on the vowel
are there intervals, entrances or rhythms that are difficult? take the time to breakdown challenging musical moments
5. Work on Italian pronunciation of the text
look for IPA translations and/or YouTube clips that have someone speaking the text
6. Start putting together melody and text
record yourself and give yourself feedback
work in small sections (a few measures at a time)
7. Practice finding your starting notes in each phrase
listen to the piano accompaniment - stop on each vocal entrance and isolate your starting note for that phrase