Short answer:

• Śvetāmbara tradition: begin with the Mūla-sutras—especially Uttarādhyayana Sūtra; then Daśavaikālika and Āvaśyaka. The first Anga (Ācārāṅga Sūtra) is primary, but it is dense—so most beginners start with Uttarādhyayana for clear, practical guidance.
• Digambara tradition: the original Āgamas are held to be lost; a balanced starting text accepted by both traditions is Tattvārtha Sūtra. For lay conduct, Ratnakaraṇḍa-śrāvakācāra is next; advanced study later includes Samayasāra, Ṣaṭkhaṇḍāgama.

Why this order (kept within Jain tradition):

• Uttarādhyayana Sūtra gives direct teachings on right faith, conduct, vows, and stories—ideal for a beginner’s swAdhyāy.
• Daśavaikālika Sūtra is concise guidance on discipline and daily conduct of monks and laypeople.
• Tattvārtha Sūtra systematically presents the tattvas and the path (samyagdarśana–jñāna–cāritra), and is accepted in both sects—hence a safe common “first text” for many.

Simple starting plan: 1) Daily: read a small portion of Uttarādhyayana Sūtra with meaning. 2) Then add Daśavaikālika (selected adhyayanas). 3) Parallel or next: Tattvārtha Sūtra (slow, with meanings), so the tattvas are clear. 4) Later, study Ācārāṅga Sūtra with a teacher for depth in ahiṁsā and ācāra. 5) Keep the four anuyogas in view; Uttarādhyayana nicely touches all four, which balances one’s study.

Notes on differences:

• Śvetāmbara: preserves 45 Āgamas; hence beginners commonly start with Mūla-sutras (Uttarādhyayana, Daśavaikālika, Āvaśyaka).
• Digambara: holds that the original Āgamas are lost; foundational study uses texts like Tattvārtha Sūtra and Ratnakaraṇḍa-śrāvakācāra before advanced works.

Keep the spiritual intent: read slowly, understand the arth (meaning), and apply it in samayik, pratikraman, and daily conduct.