Yes. Starting indoors is often the wiser choice because the first phase can be unpredictable. A calm room with a bathroom, shade, a place to lie down, and minimal noise helps you settle before deciding whether a beach setting feels right.
If possible, pick an indoor base close to the beach so you can step outside later. Plan simple logistics: weather and crowds, a quiet route, an easy way back inside, water, sun protection, and light clothing. Move only when everyone feels stable and wants to, and avoid relocating during intense moments.
Having a trusted sober sitter helps you gauge timing and comfort. For more thoughts on outdoor timing and beach specifics, see this Q&A about beach sessions.
Choose flexibility over commitment, and have a gentle day.