For rules for householders (śrāvaka-dharma) in Jainism, the best and most well-known text is:

_Ratnakaranda Śrāvakācāra_ by Āchārya Samantabhadra

It is considered a very important Jain text for understanding:

• duties of a householder
• the 12 vows
• right conduct in daily life
• discipline, charity, restraint, and non-violence
• the path of spiritual progress for lay followers

If you want a simple practical study, this is usually the first recommendation.

Other useful texts are:

• _Āvaśyaka Sūtra_ — for daily essential practices
• _Purushārtha Siddhyupāya_ — for ethical conduct and non-violence
• _Śrāvakācāra_ texts by various ācāryas — detailed guidance for lay life

If you want, I can also tell you the best text according to Digambara or Śvetāmbara tradition.