What will happen if I tried to boot into twrp recovery without flashing it (not made for my device)

As their is no twrp recovery for my device (vivo 1802 mtk device) I was thinking of booting into twrp recovery not made for my device specifically **Without** flashing it. To get the job done maybe some backups or flashing using twrp. But I don’t know what will be the consequences of it…… If anyone got idea or hands on experience on it, I would like to know