Here are some connectors that you can use to connect one sentence to another.
These are used to start a paragraph
At first = Al principio
At the beginning= Al principio
First of All = Antes que nada
Firstly = En primer lugar
To start With = para empezar
Inicially = inicialmente
many tranks you
First of all, My name is Wendy.
Thanks for the input
Amazing! Thanks bro!!!