Yes, it is totally normal to have developing pods and flowers on the same plant. The main stem develops the fastest, then the side branches follow, from the top down to the bottom. Eventually, the whole plant will have green pods. Maturity also starts at the main stem but the difference to the lower branches isn’t as big as during flowering. No, the first pods won’t shatter.
Camelina seeds are quite small: about the size of alfalfa seeds, 1/3 the size of canola seeds. Make sure to seed Camelina as shallowly as possible. We recommend not seeding deeper than half an inch. Nevertheless, Camelina can be seeded with any seeding equipment. One way to seed Camelina is to broadcast the seed with a Valmar spreader followed by heavy harrowing. Camelina seeds need a good seed-soil contact and like most other crops, Camelina seeds need moisture to get a good start.