Weight loss while pregnant?

Tayla🌼 • Two daughters 🌸🌸 13month Gap. 👶🏼 👶🏼 👼 healing from loss 😭 at 11 weeks pregnant. NOW -🌈 👶🏼 on board

Long story short I’m pregnant round 2 my first baby is only 6 months old, I hadn’t lost my first baby weight & now pregnant again I’m worried what my weight will do ! Can anyone suggest any exercises to safely do but successfully lose weight ? Walking would be good but then sun where I live in Australia is 43* degrees everyday !!!! It’s to hot to go walking with pram! I’m also still breast feeding ! I feel very bloated but definitely don’t like what I see in the mirror!