Great idea. Here are JainKnowledge-friendly online resources and study guides to learn Ardhamagadhi (Śvetāmbara tradition):

• Prakrit study material ( Ardhamagadhī Prakrit materials, beginner guides, and practice): you can read more here
• Language overview and context for Jain scriptures (what language they’re in, with Ardhamagadhi emphasis): you can read more here

Notes to help your path:

• Ardhamagadhī texts commonly studied include foundational sutras like Kalpa Sūtra and Antakrddasha Sūtra, along with stotras such as Logassa (Logassa Stotra). The Prakrit study material page mentions these as part of beginner-friendly material.
• The two main dialects you’ll encounter in Jain texts are Ardhamagadhī (Śvetāmbara) and Shauraseni (often linked with Digambar texts), so start with Ardhamagadhī resources if you’re aiming for Śvetāmbara texts, and use Shauraseni materials later for broader coverage. The Prakrit study material page explains these dialects and study focus.

If you’d like, tell me which dialect you prefer to start with (Ardhamagadhī or Shauraseni), and I can tailor a simple step-by-step plan with short reading passages and practice questions using JainKnowledge resources.