Best is ragi.. good for baby but it's little long process because removing husk s good n helps baby digest easily 
Soak ragi Small cup for two to four HR grind n then strain the water slowly heat The water as u can see it becomes thick option can add Apple small size

Start with vegetable and fruit puree at first. This will guide u 
Things to know before starting solid to baby 
<a href="https://youtu.be/KrhSLFY4Q9o">https://youtu.be/KrhSLFY4Q9o</a>

Start with liquids first dear then semi solids and then solids.

<a href="http://app.babychakra.com/article/209">Weaning Food Recipe (7 to 9 months)</a>

<a href="http://app.babychakra.com/article/99">Weaning Foods for Indian Mums: </a><a href="http://app.babychakra.com/article/99">Khyati's</a><a href="http://app.babychakra.com/article/99"> Checklist</a> 
<a href="http://app.babychakra.com/article/4151">Easy And Quick Weaning Recipe: Banana </a><a href="http://app.babychakra.com/article/4151">Kheer</a>

Hello folks..my baby turned 6months..what food should i start with her so that she can easily digest and gain weight