Your Jupiter mahadasha has started from February 2018. It will be till February 2034. The Jupiter mahadasha is for 16 year, which is a very long time in ones life. The effects of Jupiter mahadasha will also depend upon the antardasha of planets and transit (gochar) of Jupiter. Jupiter as per your birth chart is the lord of 5th house and also 8th house. Therefore both house will play an important role during this dasha period. It should be better than the Rahu mahadasha which completed. You should wear Yellow Sapphire in Gold on your right hand Index finger for gains.