Day trading - international

Questions ;

Since all accounts at Alpaca is margin accounts

How can I set the account to 1x only but use it as day trade

I intend to use it currently as

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1- “cash account 1x + “no leverage / no margins) until I get more into trading

2- without any restrictions on day trading “infinite buying and selling on unsettled cash” on 1x only

And if possible, does the interest apply if points above :backhand_index_pointing_up: are used

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In Alpaca Trading , Does PDT “pattern day trading” rule apply to international non us residents accounts ?

And if so , Does it require for non us residents to maintain $25K to have infinite no. of buying and selling on day trading on unsettled cash ?