Vaheguru Ji Ka Khalsa, Vaheguru Ji Ki Fateh.
Daas is a Sehajdhari, and with Waheguru's Kirpa, is hoping to take Amrit and be blessed with a Gursikhi Jivan.
Daas maintains all Kakaar's
except Kirpan. I personally feel that it would be dishonourable to keep a Kirpan without having taken Amrit, and though one could argue the same for all Kakaars, I believe there is an inherent responsibility involved in keeping a Kirpan.
On a side note - I was having difficultly understanding some Gurbani arths and concepts, and a Gursikh advised that whenever I do Paat to always keep all Kakaars with me (incl. Kirpan), have faith, and Guru Sahib will reveal all.
I believe Bhai Kahn Singh Nabha defined a Sehajdhari as typically a Sikh who keeps all rehats except that of Kacchera and Kirpan.
I feel a Kangha should always be kept within the Kes and Keski. A Kacchera can be worn at any time, but if one is looking for an "appropriate" time (akin to a person being able to tie their own Kes and Keski) then I guess the "latest" time would be at Puberty?
Bhul Chuk Maaf,
Vaheguru Ji Ka Khalsa, Vaheguru Ji Ki Fateh.