Needle doesn't make contact with album-can I adjust it myself?

Easy things first ... make sure the needle is inserted/tightened correctly. Then make sure the stitch width dial is set correctly.
If your needle is truly out of alignment then this video should help

https://www.google.com/search?q=sewing+machine+needle+not+centered&oq=sewing+machine+needle+not+centered&gs_lcrp=EgZjaHJvbWUyCQgAEEUYORiABDIICAEQABgWGB4yCAgCEAAYFhgeMggIAxAAGBYYHjIICAQQABgWGB4yDQgFEAAYhgMYgAQYigUyDQgGEAAYhgMYgAQYigXSAQoxMTUyMWoxajE1qAIAsAIA&sourceid=chrome&ie=UTF-8

Service manual is available at modest cost. $12 USD or $5.50 AUD.

https://www.google.com/search?q=janome+mb7+service+manual

Adjusting needle bar height

https://www.google.com/search?q=janome+mb7+adjust+needle+bar

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Hello Dear Jeff Moore!
greeting
FYI......
Needle bar is out of position. Press OK to move the needle bar to switching position. (Needle bar change over phase.) 3. Remove the stationary cover then turn the hand wheel to 270°. Using a 2.5mm hex driver, turn the silver gear on the needle-change step motor to move the head from needle bar #1 to #4 then back to #1 to check for any binds. If there is a bind, adjust 'head play' as shown in the service manual. 4. Check and adjust 'moving head stop position' and 'needle stop position' as shown in the service manual.

I gather you don't know how to adjust the tonearm. First put the stylus pressure, and antiskating to zero. Balance the tonearm for a free floating position. Ortofon cartridges will list the stylus pressure, generally 1.5 grams. Dial in the correct pressure, and set the antiskating to the same as the stylus pressure. If you require more assistance, or would like to inquire about repairing your Technics, please visit my website at audioserviceclinic.com. You may contact me there. Thank you.

Higher end turntables have an adjustment for Balance force. This is the balance of the arm such that the needle is off balance to the point where it pushes down onto the record album. The force with which it pushes down needs to be minimal but it needs to be enough to keep the needle in the grove.
1 to 2 grams is nominal but needles usually have the force setting listed.
More info can be had here: https://kb.wisc.edu/wsum/page.php?id=20270

check to see if the needle is inserted correctly
make sure it's the right needle for the machine
try adjusting the tension setting to a higher number or letter
if that doesn't work, I suggest taking the machine in to be checked

Hi, at the base of the tonearm on the left side is a rubber grommet. Remove and insert a flat blade screw driver. Adjust slightly to the right and test. Adjust until needle lands in correct position at start of record. Cheers John. Stylus City

have you tried changing the needle?
clean under the needle plate for lint or thread

hi,either the needle is worn so maybe time for a new needle.try winding in the weight towards the needle.good luck

When I was young I taped a penny on top of the head above needle.Those were the great days 45's rules.