How do I build bird houses out of reclaimed wood?

Ihave learning disblity and only have combo drill screw gun skill saw, and heavy circular saw skill saw 7 1/4 inch would like to make birx houses and cute eady reclaimed wood and oallet wood all the wood it cleaned up different sizes witdths thickness not goid,with taoe measure inbetween measured, and painting tbem but i have whole shed of reclaimed wood naules all out reay to use would like to learn but its hard

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