In places where there are no preceptors, can we give two introductory sittings face-to-face and subsequently give remote sittings to finish the introductory process, arranging with the concerned prospective abhyasi(s)?

When giving introductory sittings, yes you can give two face-to-face and the following sitting(s) remotely. When you do this, please make sure you are in contact with the seekers, so that you can confirm that they will sit at the same time as you for the sittings, and that they receive as many sittings as they require to get started.