Do the Puja anyway you can,
with devotion and love for Lord in your heart.
God out of His mercy will overlook all the shortcomings of men if they pursue the path of devotion with fervour. At the end of worship, daily or occasional, a prayer is offered to God not to mind the defects while chanting the mantras or adopting the procedures or for forgetting to do some duties out of ignorance. The Almighty is compassionate enough to ignore such errors. Thus, mercy being His chief trait, a devotee need not be concerned with minor defects if his endeavour is absolutely sincere but the enjoined duties should not be abandoned.
yasya smR^ityaa cha naamnoktyaa tapaH puujaa kriyaadishu |
nyuunaM sampuurNataaM yaati sadyo vandey tam.h achyutam.h ||
This shloka will take care of any shortcomings in the puja procedure.